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2 Minute Medicine | October 23, 2014

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The Classics Series™: Complete Directory

Seminal studies in medicine

Click on a title to link directly to our full summary.

Below are physician-written reports and summaries of many of the key landmark trials in medicine and surgery. You may sort the chart in alphabetical order, by number of citations, journal, etc. by clicking on the appropriate heading. New summaries are added weekly.

Use the real-time search box below to filter in real-time by disease, drug, trial name, etc. (i.e. Type in “warfarin” and the list will auto-sort and list seminal studies on warfarin!)

Title
Journal, year
Citations
Key findings
The UKPDS: Reducing the risk of diabetes-related morbidity and mortalityThe Lancet, 1998
BMJ, 1998
20000+1. For patients with type 2 diabetes mellitus, pharmacologic blood glucose control with sulfonylureas or insulin significantly reduces the risk of microvascular complications, but not macrovascular complications
2. Metformin therapy is associated with significant reductions in diabetes-related and all-cause mortality; thus, it is considered first-line therapy for type 2 diabetes mellitus
3. Strict control of blood pressure in type 2 diabetes mellitus reduces the risk of both microvascular and macrovascular complications, along with diabetes-related mortality
The CARE trial: Statins in coronary artery diseaseNEJM, 199663211. Cholesterol-lowering therapy with statins reduces the risk of coronary events and stroke in patients with previous coronary artery disease and low-density lipoprotein levels >125 mg/dL
2. The reduction in coronary events with statin therapy was greater in women and patients with higher pre-treatment levels of cholesterol
The RENAAL Trial: Losartan in diabetic nephropathyNEJM, 200156461. In patients with type II diabetes and nephropathy, losartan at a dose of 50-100 mg daily significantly reduced the risk of developing end-stage renal disease compared to placebo
2. While losartan also significantly reduced the degree of proteinuria in these patients, it did not significantly reduce mortality when compared with placebo
The Rivers trial: Early goal-directed therapy in severe sepsis and septic shockNEJM, 200156031.     Early goal-directed therapy in patients with severe sepsis and septic shock prior to admission to the intensive care unit significantly reduces organ dysfunction and mortality rates compared to standard therapy to achieve parameters for hemodynamic support
The RALES trial: Spironolactone decreases all-cause mortality in heart failure patientsNEJM, 199951911.     Adding 25 mg of spironolactone to standard therapy reduces all-cause mortality in heart failure patients with an ejection fraction <35%
The HOPE trial: Ramipril significantly reduces cardiovascular events in high-risk patients with normal ejection fractionsNEJM, 200051501.     Ramipril significantly reduces cardiovascular events including MI, stroke and death in high risk-patients in the absence of left ventricular dysfunction
The Child-Pugh score: Prognosis in chronic liver disease and cirrhosisBritish Journal of Surgery, 197346231. The Child-Pugh score consists of five clinical features and is used to assess the prognosis of chronic liver disease and cirrhosis
2. The Child-Pugh score was originally developed in 1973 to predict surgical outcomes in patients presenting with bleeding esophageal varices
3. The score is used with the Model for End-Stage Liver Disease (MELD) to determine priority for liver transplantation
Angiotensin-receptor blockers in diabetic nephropathyNEJM, 200146191. Irbesartan was associated with a significantly lower risk of doubling of serum creatinine concentration, developing end-stage renal disease, or death from all causes
2. Serum creatinine concentration increased at a slower rate in patients receiving irbesartan compared to amlodipine and placebo groups
The SAVE trial: Captopril after acute MI reduces mortality and morbidityNEJM, 199244101.     Treating patients with captopril after acute MI with asymptomatic LV dysfunction reduces mortality from cardiovascular causes (i.e., atherosclerotic heart disease, progressive heart failure)
2.     The captopril group experienced lower rates of hospitalization due to heart failure and recurrent MI
The HMPS I: Adverse events in patients and negligenceNEJM, 199138001.     It was found that adverse events occurred in 3.7% of hospitalizations
2.     Approximately 27.6% of adverse events occurring in hospital were attributed to negligence
The OHTS trial: Topical ocular hypotensive medication reduces risk of open-angle glaucomaArchives of Opthalmology, 200236841. At 5 years, the probability of developing open-angle glaucoma was significantly lower in the group that received topical ocular hypotensive medication compared to the observed group
2. Older age, male gender, African-American ethnicity, larger cup-to-disc ratios, higher IOP, greater visual field deficits, heart disease, and reduced cornea thickness were predictors of the development of glaucoma
The DASH trial: Diet change significantly reduces blood pressureNEJM, 199734771. A “combination” diet rich in fruits and vegetables and low in saturated and total fat reduces blood pressure in comparison to the typical American diet
2. Blood-pressure reductions were observed in the setting of stable weight, unchanged sodium intake, and consumption of no more than two alcoholic drinks per day
The MADIT-II: Prophylactic defibrillator improves survival in patients with myocardial infarction and left ventricular dysfunctionNEJM, 200233191.     This trial found a 31% reduction in risk of death associated with implantation of a defibrillator compared to conventional therapy
2.     Rates of hospitalization with heart failure were somewhat higher in the defibrillator group, though this did not reach significance
The PROVE IT trial: High-dose statin regimen reduces mortality after ACS NEJM, 200429321. High-dose atorvastatin was associated with a 16% reduction in death or major cardiovascular events compared to standard pravastatin therapy following an acute coronary syndrome
2. The protective effect of intensive lipid-lowering was evident in the first 30 days of therapy and was consistent across pre-specified subgroups
The HMPS II: Characterizing adverse events in hospitalized patientsNEJM, 199129141. Drug-related complications were the most common type of adverse event in hospitalized patients
2. Adverse events due to negligence in hospitalized patients were more likely to cause serious disability or death than adverse events not attributed to negligence
The CURE trial: Clopidogrel in ACS without ST-elevationNEJM, 200129111.     The addition of clopidogrel significantly reduced the risk of death from cardiovascular causes, nonfatal myocardial infarction, or other ischemic events in patients with ACS without ST elevation2.     Adding clopidogrel is associated with significantly higher risk of major and minor bleeding, but not life-threatening bleeding
The EPHESUS trial: Eplerenone in heart failure after myocardial infarctionNEJM, 200328751. Eplerenone significantly reduces all-cause mortality in patients with heart failure and left ventricular dysfunction (LVEF≤40%) after myocardial infarction when compared with placebo
2. Eplerenone treatment in this setting also significantly reduced mortality from cardiovascular causes and hospitalizations for cardiovascular issues
The CATIE trial: High rates of medication discontinuation in schizophrenic patientsNEJM, 200528321. Approximately 74% of schizophrenic patients discontinued their medications before 18 months, with the median being approximately 6 months
2. Olanzapine was found to have a significantly longer time to discontinuation than quetiapine and risperidone
3. Olanzapine was associated with significantly more weight gain and increases in glycosylated hemoglobin, cholesterol, and triglycerides when compared to the other antipsychotics
The TRITON trial: Prasugrel vs clopidogrel in ACSNEJM, 200727931. Prasugrel was more effective than clopidogrel in reducing the incidence of recurrent myocardial infarction in patients presenting with acute coronary syndrome, though there was no difference in mortality between the two groups
2. Patients treated with prasugrel had a significantly higher incidence of fatal major bleeding compared to clopidogrel
No difference in long-term survival after breast-conserving surgery compared to mastectomyNEJM, 200226711.     In women with stage I or II breast cancer, there was no significant difference in overall survival in women treated with total mastectomy compared to breast-conserving surgery
2.     Adjuvant radiation therapy was associated with reduced ipsilateral recurrence in lumpectomy-treated women
The TRICC trial: Restrictive transfusion in intensive care does not increase mortalityNEJM, 199926251. Using a restrictive transfusion strategy in critically ill patients did not significantly increase 30-day mortality when compared with a liberal transfusion strategy
2. Subgroup analyses demonstrated that a restrictive transfusion strategy was associated with significantly lower mortality in patients with APACHE II score ≤20 and age <55 years
The JUPITER trial: Rosuvastatin decreases the rate of cardiovascular events in healthy men and women with elevated CRP levelsNEJM, 200826111.     Rosuvastatin significantly decreased the incidence of a first major cardiovascular event compared to placebo
2.     Rosuvastatin also significantly decreased the risk of all cause mortality by 20% compared to placebo
The Val-HeFT trial: Valsartan reduces morbidity in chronic heart failureNEJM, 200125781. Valsartan, an angiotensin-receptor blocker, significantly reduces morbidity, but not mortality, in heart failure patients when added to background therapy
2. As an exception, valsartan was associated with increased morbidity and mortality in patients already receiving both an angiotensin-converting-enzyme inhibitor and beta-blocker
The MERIT-HF trial: Addition of metoprolol reduces mortality in patients with symptomatic heart failureThe Lancet, 199925331.     In patients with symptomatic heart failure and reduced ejection fraction, the addition of metoprolol to standard therapy reduced all-cause mortality by 34% compared to placebo
2.     Similar findings were reported by the CIBIS-II trial
The MELD score: Predicting survival in end-stage liver diseaseHepatology, 200123761. The Model for End-Stage Liver Disease (MELD) is a reliable tool for predicting short-term survival in patients with advanced liver disease
2. The score is generalizable to diverse etiologies and a wide range of disease severity
The RELY trial: Dabigatran non-inferior to warfarin in preventing strokes in patients with atrial fibrillationNEJM, 200922851.     High-dose dabigatran is superior to warfarin in the prevention of strokes in patients with atrial fibrillation, while low-dose dabigatran is non-inferior to warfarin in preventing strokes in this population
2.     There is lower risk of major hemorrhage on low-dose dabigatran compared to warfarin, while there is similar rate of major hemorrhage on high-dose dabigatran as compared to warfarin
The Bogalusa Heart Study: Childhood weight status and cardiovascular risk factorsPediatrics, 199921991. Children recruited for weight and cardiovascular risk assessment were found to have higher frequencies of cardiac risks factors as their BMIs increased
2. Among the cardiovascular risk factors assessed, overweight youth had the highest odds of having elevated insulin levels
The ACCORD trial: Intensive glucose control associated with increased mortalityNEJM, 200821871. Previous studies suggest that intensive blood glucose control reduces the risk of microvascular complications, though questions remained regarding the impact on macrovascular complications and mortality
2. This study found that targeting HbA1c <6.0% resulted in higher risk of cardiovascular and all-cause mortality as compared with standard therapy (i.e., targeting HbA1c between 7.0-7.9%)
The TORCH Trial: Combination of salmeterol and fluticasone in treating COPDNEJM, 200721481. The combination of salmeterol and fluticasone did not significantly reduce all-cause mortality in patients with chronic pulmonary obstructive disease (COPD)
2. When compared with salmeterol alone, fluticasone alone, and placebo, combination therapy significantly reduced the risk of exacerbations and the need for systemic corticosteroids during exacerbations
Finasteride significantly reduces incidence of prostate cancerNEJM, 200321411. Finasteride therapy was found to significantly reduce the incidence of prostate cancer compared to placebo
2. Patients treated with finasteride were significantly more likely to have high-grade prostate cancers
3. Patients on finasteride experienced significantly higher rates of sexual side effects, included erectile dysfunction, loss of libido, and gynecomastia
Experimental gene therapy results in full clinical reversal of X-linked SCIDScience, 200021111. Two patients with X-linked severe combined immunodeficiency were treated with a retroviral-vector containing γc receptor for IL-2 with full clinical reversal after ten months
2. No side effects were reported during the study period
The ALLHAT: Thiazide diuretics as first-line antihypertensive therapyJAMA, 200220971. There were no significant differences in the rates of fatal coronary heart disease or nonfatal myocardial infarction when comparing thiazide diuretics with ACE-Is or CCBs in hypertension management
2. Thiazide diuretics are the cheapest option amongst common first-line antihypertensives
The CHADS2 score: Stroke risk in atrial fibrillationJAMA, 200119661.     The CHADS2 index is an accurate predictor of stroke in patients with non-rheumatic atrial fibrillation
2.     CHADS2 scores can be used to aid decisions regarding the need for anti-thrombotic therapy
The CAST trial: Anti-arrhythmic agents increase risk of death in patients after MINEJM, 199119631.     The use of class IC anti-arrhythmic agents flecainide and encainide in patients following myocardial infarction with left ventricular dysfunction increases the risk of death due to arrhythmia and shock
The MIRACL trial: Atorvastatin reduces recurrent ischemia post-ACSJAMA, 200119141. Atorvastatin 80 mg per day reduced the recurrence of ischemic events in the first 16 weeks after the onset of an ACS, defined as unstable angina or non-Q-wave MI
2. There was no statistically significant difference in the incidence of death, nonfatal MI, or cardiac arrest between the atorvastatin and placebo groups after an ACS
Interferon beta-1b for relapsing-remitting multiple sclerosisNeurology, 199319011. Treatment with interferon beta-1b reduced the rate of multiple sclerosis exacerbations in patients with relapsing-remitting multiple sclerosis, in a dose-dependent fashion
2. Serial magnetic resonance imaging revealed less multiple sclerosis activity in patients with increasing doses of IFNB
3. There was no difference in disability caused by IFNB treatment
The PLCO trial 1: PSA and digital rectal examination in prostate cancer screeningNEJM, 200918211. Subjects undergoing annual prostate-specific antigen (PSA) testing for 6 years and annual digital rectal examination (DRE) for 4 years experienced significantly increased incidence of prostate cancer compared to usual care
2. Screening with PSA testing and DRE does not significantly reduce mortality from prostate cancer compared to usual care
The COURAGE trial: PCI does not improve mortality in medically optimized patients with stable coronary artery diseaseNEJM, 200717851.     Addition of percutaneous cutaneous intervention (PCI) to optimal medical therapy for patients with stable coronary artery disease does not improve mortality or cardiovascular outcomes
The ECASS-III trial: Administering recombinant t-PA up to 4.5 hours after onset of acute ischemic stroke improves neurological outcomesNEJM, 200817771.     Alteplase administered between 3 to 4.5 hours after the onset of acute ischemic stroke improves functional outcomes at 90 days, when compared to placebo
The PLATO trial: Ticagrelor vs clopidogrel for ACSNEJM, 200917711. Treatment with ticagrelor significantly reduces mortality in patients with acute coronary syndrome when compared to clopidogrel
2. Ticagrelor does not significantly increase the incidence of major bleeding
The AFFIRM trial: Rate-control vs. rhythm-control in atrial fibrillationNEJM, 200217651.     Rate-control, along with anticoagulation, should be the main approach to managing patients with atrial fibrillation
2.     Compared to rhythm-control, rate-control resulted in a lower incidence of adverse events and no significant difference in mortality
The CHARM-Preserved trial: Candesartan in heart failure with preserved ejection fractionThe Lancet, 200317081. In patients with heart failure and preserved ejection fraction, candesartan does not significantly reduce the rate of cardiovascular death, but does significantly reduce the rate of hospitalization for heart failure as compared with placebo
The ADVANCE trial: Intensive glycemic control reduces risk of nephropathyNEJM, 200816371.     Intensive glycemic control was significantly associated with lower rates of new or worsened nephropathy when compared to conventional glycemic control (≤ 180 mg/dL)
2.     There was no significant reduction in major macrovascular events associated with intensive blood sugar control
Quadrivalent HPV vaccine in young womenThe Lancet, 200516021. Prophylactic use of a quadrivalent vaccine against HPV strains 6, 11, 16, and 18 significantly reduced the incidence of HPV infection and HPV-associated genital disease 30 months after vaccination
2. No significant adverse effects were observed to be due to the vaccinations
The CLARITY trial: Adding clopidogrel to STEMI managementNEJM, 200515981. The early addition of clopidogrel significantly reduced the incidence of infarct-related arterial re-occlusion within 30 days following myocardial infarction
2. Addition of early clopidogrel improved the outcomes of coronary angiography and decreased the need for early/emergent angiography during the event
3. There were no differences in major or minor bleeding or intracranial hemorrhage incidence between the clopidogrel group and the control group
Mild hypothermia improves neurological outcome after cardiac arrestNEJM, 200215561. Initiation of hypothermia protocol for 24 hours after a cardiac arrest significantly improved neurological outcome in surviving patients
2. Patients who underwent the hypothermia protocol had a significantly lower mortality rate at 6 months
3. There were no significant differences in adverse outcomes between the two groups
The MDRD trial: Protein intake and blood pressure control in renal insufficiencyNEJM, 199415451. Reducing protein intake and lower blood pressure targets did not significantly delay the rate of decline in GFR in patients with renal insufficiency at 3 years
2. In patients with elevated baseline proteinuria (≥1 g/day in moderate insufficiency, ≥3 g/day in severe insufficiency), lower blood pressure targets significantly delayed the progression of renal disease
The Lee index: Risk of perioperative cardiac eventsCirculation, 199914831.     The Lee index is a prospectively validated model that predicts the risk of a cardiac event in patients undergoing noncardiac surgery
2.     The six independent predictors are as follows: 1) high-risk surgery, 2) history of ischemic heart disease, 3) history of congestive heart failure, 4) history of cerebrovascular disease, 5) preoperative treatment with insulin, 6) preoperative serum creatinine >2.0 mg/dL (>177 µmol/L)
Early retroviral therapy reduces HIV-1 transmissionNEJM, 201114601. HIV-1 transmission rates were significantly lower in the early-therapy group compared to the delayed-therapy group
2. Patients in the early-therapy group had lower incidence of HIV-related clinical events with a lower viral load and higher CD4 cell count than those whose therapy was delayed
The CHOIR trial: Target lower hemoglobin levels in patients with anemia and chronic kidney diseaseNEJM, 200614511.     In patients with anemia and chronic kidney disease, treating with epoetin alfa to a lower hemoglobin target was associated with significantly reduced incidence of the composite event (death, MI, hospitalization for CHF, and stroke)
2.     Achieving the lower hemoglobin target required significantly lower doses of epoetin alfa
Dose-response relationship noted between television watching and obesityPediatrics, 198514141. A dose-response relationship was observed between child and adolescent television watching and obesity in children studied through the National Health Examination Survey
2. In multiple regression analysis, only prior history of obesity was found to be more influential than television watching on obesity prevalence
The DIGAMI trial: Insulin-glucose infusion in diabetics with acute MIJACC, 199514131. In diabetic patients with acute myocardial infarction, insulin-glucose infusion with subsequent long-term insulin treatment reduces mortality at 1 year
The ARDSNet trial: Lower tidal volume ventilation in ALI/ARDSNEJM, 200014101. The trial was terminated early when the data demonstrated that lower tidal volume ventilator settings in ALI/ARDS patients led to a significant decrease in in-hospital mortality
2. Low tidal volume ventilation also led to an increase in ventilator-free days and a decrease in the number of days with systemic organ failure. There was no change in the incidence of barotrauma between the two groups
3. Patients assigned to lower tidal volume ventilator settings initially required a higher PEEP to maintain arterial oxygenation and were more likely to develop respiratory acidosis, although the difference disappeared by day 7
The COMMIT trial: Metoprolol and clopidogrel in patients with acute MIThe Lancet, 20051400+1. Adding early metoprolol does not further decrease the risk of death post-MI compared to conventional fibrinolytic therapy alone
2. Use of early metoprolol decreases the risk of reinfarction and ventricular fibrillation, but increases the risk of cardiogenic shock
3. Adding clopidogrel to aspirin decreases the combined risk of death, reinfarction, or stroke post-MI, without significantly increasing the risk of major bleeding
The NETT: Lung-volume-reduction surgery in emphysemaNEJM, 200313861. Lung-volume-reduction surgery significantly improves exercise capacity, but not overall survival, in patients with emphysema when compared with medical therapy
2. Post hoc subgroup analyses showed that in patients with upper-lobe emphysema and low baseline exercise capacity, lung-volume-reduction surgery significantly decreased mortality compared to medical therapy
Vena caval filters in pulmonary embolism prophylaxisNEJM, 199813651. Permanent vena caval filter placement in addition to anticoagulant therapy helps prevent short-term occurrence of pulmonary embolism but increases the risk of recurrent DVT in the long-term
2. There is no significant difference in efficacy between LMWH and UFH during early anticoagulant therapy for PE prophylaxis
Vena caval filters in pulmonary embolism prophylaxisNEJM, 199813561. Permanent vena caval filter placement in addition to anticoagulant therapy helps prevent short-term occurrence of pulmonary embolism but increases the risk of recurrent DVT in the long-term
2. There is no significant difference in efficacy between LMWH and UFH during early anticoagulant therapy for PE prophylaxis
The SYNTAX trial: CABG superior to PCI in triple-vessel or left main artery diseaseNEJM, 200912931.     In severe coronary artery disease, CABG is superior to PCI in reducing the need for repeat vascularization
2.     CABG should remain the standard of care for severe coronary artery disease, despite being associated with a higher risk of stroke
The SOLVD trial: Enalapril in heart failure with reduced ejection fractionNEJM, 199112861. Enalapril significantly reduced the risk of all-cause mortality in patients with congestive heart failure and reduced left ventricular ejection fraction (LVEF≤35%) compared to placebo
2. Patients being treated with enalapril had significantly higher risk of developing elevated serum potassium levels and serum creatinine levels
PROS network study examines pubertal onset by race/ethnic groupsPediatrics, 199712481. In a study population of girls 3-12 years of age, it was found that African-American females developed secondary sexual characteristics at a significantly earlier age than white girls
2. African-American females had earlier menarche at 12.16 years of age, compared to 12.88 years of age among white females
Donepezil and vitamin E in Alzheimer’s diseaseNEJM, 200512421. High-dose vitamin E supplementation does not slow down progression to Alzheimer’s disease
2. Donepezil, a cholinesterase inhibitor, shows modest reductions in risk of progression to Alzheimer’s disease early in treatment
The ARISTOTLE trial: Apixaban vs warfarin in atrial fibrillationNEJM, 201112251. Apixiban is superior to warfarin in preventing stroke in patients with atrial fibrillation
2. Apixaban has a decreased risk of intracranial hemorrhage compared to warfarin
3. There is no difference in GI bleeding risk between apixaban and warfarin
The NICE-SUGAR trial: Intensive glycemic control harmful in the ICUNEJM, 200912161.     Tight glycemic control (81-108 mg/dL) in critically ill patients is associated with higher mortality when compared to conventional glycemic control (≤ 180 mg/dL)
The ACCOMPLISH trial: ACE inhibitors and calcium channel blockers for hypertensionNEJM, 200812051. Benazepril plus amlodipine offers the same effect at reducing blood pressure in hypertensive patients as benazepril plus hydrochlorothiazide
2. Benazepril plus amlodipine was more effective than benazepril plus hydrochlorothiazide at reducing cardiovascular events in hypertensive patients at risk for such events
The ONTARGET trial: Telmisartan is non-inferior to ramipril in improving cardiovascular outcomes in high-risk populationsNEJM, 200811721.     The angiotensin receptor blocker (ARB) telmisartan is non-inferior to the ACE-inhibitor rampiril in improving cardiovascular outcomes in high-risk populations
2.     Telmisartan is significantly less often associated with angioedema and cough compared to ramipril
3.     Telmisartan in addition to ramipril in high risk populations does not offer additional benefit, and is associated with increased risk of complications
Albumin in cirrhotic patients with spontaneous bacterial peritonitisNEJM, 199911291. In cirrhotic patients with spontaneous bacterial peritonitis, albumin infusion on days 1 and 3 of treatment in addition to antibiotics significantly reduces the risk of developing renal impairment and mortality when compared with antibiotics alone
The UPLIFT trial: Tiotropium in chronic obstructive pulmonary diseaseNEJM, 200811041. Tiotropium does not significantly reduce the mean rate of decline in FEV1, a common metric of COPD progression
2. Tiotropium significantly improves patients’ quality of life, mean FEV1, and decreases the incidence of disease exacerbation
The SAFE trial: Normal saline vs. albumin for fluid resuscitationNEJM, 200410711.     There was no significant difference in 28-day mortality when comparing albumin and normal saline for fluid resuscitation in the intensive care setting
2.     Compared to normal saline, fluid resuscitation with albumin did not yield any significant benefits in terms of secondary outcomes (i.e., length of ICU/hospital stay, duration of supportive treatment measures)
The ENHANCE trial: Simvastatin and ezetimibe in familial hypercholesterolemiaNEJM, 200810641. In patients with familial hypercholesterolemia, simvastatin and ezetimibe combination therapy does not result in significant differences in carotid artery thickness when compared to treatment with simvastatin alone
2. Treatment with simvastatin and ezetimibe led to significant greater reductions in LDL cholesterol, triglyceride, and C-reactive protein levels as compared to treatment with simvastatin alone
3. There were no significant differences between the two groups in the rates of adverse events or drug discontinuation
The CORTICUS trial: Hydrocortisone in septic shockNEJM, 200810511. There was no significant difference in mortality between patients with septic shock receiving low-dose hydrocortisone compared to placebo
2. Hydrocortisone therapy reversed shock more quickly, but resulted in more cases of superinfection
The CURB-65 score: Risk stratifying patients with community-acquired pneumoniaThorax, 200310091.     Patients with community acquired pneumonia (CAP) can be stratified into mortality risk groups using a six-point score (one point for each category present on initial presentation): Confusion, Urea >7 mmol/L, Respiratory rate >30/min, low systolic (<90 mm Hg) or diastolic (<60 mm Hg) Blood pressure, age >65 years (CURB-65)
2.     Patients who receive a score of >2 are at a high risk of mortality (>19%) and should be treated in hospital or considered for ICU admission
IVIg with aspirin linked to reduced coronary aneurysmsNEJM, 19869841. Children with Kawasaki disease treated with a combined regimen of aspirin and intravenous gamma globulin had significantly lower rates of coronary artery aneurysms when compared to those receiving aspirin only
2. Children treated with the combined regimen had significantly shorter fevers and a greater decrease in inflammatory markers when compared to those treated with aspirin alone
The SPARCL trial: Atorvastatin reduces risk of stroke and cardiovascular events in patients with recent stroke or transient ischemic attackNEJM, 20069721.     In patients with recent stroke or TIA, high-dose atorvastatin significantly reduces the risk of fatal stroke compared to placebo
2.     Atorvastatin was also associated with a significant reduction in risk of cardiovascular events
The CLOT trial: Dalteparin better than warfarin in preventing recurrent venous thromboembolism in patients with malignancyNEJM, 20039501.     Dalteparin, a low-molecular-weight heparin, is superior to warfarin in preventing recurrent venous thromboembolism in the setting of malignancy
2.     There was no significant difference in risk of major bleeding with dalteparin as compared to warfarin
The ATLAS trial: ACE inhibitor dosing in chronic heart failureCirculation, 19999491. When compared to a lower dose, high-dose angiotensin-converting-enzyme inhibitor significantly reduced the risk of hospitalization or death in patients with chronic heart failure
The CHARM-Alternative trial: Angiotensin-receptor blockers in heart failureThe Lancet, 20039281. Candesartan reduced cardiovascular death and hospital admission for chronic heart failure in patients with heart failure and reduced ventricular function intolerant to ACE inhibitors
2. Candesartan was well-tolerated in patients with previous intolerance to ACE inhibitors
Sleep-disordered breathing associated with poor academics and surgical improvementPediatrics, 19989111. Sleep-associated gas exchange abnormalities were highly prevalent among a first-grade study cohort with poor academic performance. About 18% of participants had oxygenation abnormalities assessed during overnight observation
2. School performance, as gauged by grades, improved significantly among children who received surgical intervention for abnormal breathing patterns during sleep
3. Symptoms of disordered sleep, as assessed by follow-up questionnaire, were significantly worse among children who did not undergo surgical tonsillectomy and adenoidectomy
The WARSS trial: Warfarin vs. aspirin in preventing recurrent ischemic strokeNEJM, 20019081. Warfarin is not superior to aspirin in preventing recurrent ischemic stroke in patients with a prior noncardioembolic ischemic stroke
2. There was no significant difference in the rates of major hemorrhage when comparing warfarin with aspirin
The CAPRICORN trial: Beta-blockers in acute myocardial infarctionThe Lancet, 20018691. Carvedilol significantly reduced mortality from cardiovascular causes and recurrent non-fatal MI
2. While carvedilol treatment was associated with a 23% relative risk reduction in all-cause mortality, this did not reach statistical significance
3. These findings are consistent with previous trials exploring the benefits of beta-blockers in managing acute MI
The CREST trial: Stenting versus endarterectomy for carotid stenosisNEJM, 20108651. The rate of stroke, myocardial infarction or death did not differ significantly between patients treated with carotid artery stenting compared to carotid endarterectomy
2. The periprocedural rate of stroke was higher with stenting while the rate of myocardial infarction was higher with endarterectomy
The ROCKET AF: Rivaroxaban in atrial fibrillationNEJM, 20118241.     Rivaroxaban is non-inferior to warfarin in preventing strokes and systemic embolism
2.     Although there is no significant difference between the two in the incidence of clinically relevant bleeding, rivaroxaban is associated with significantly lower rates of critical, fatal, and intracranial bleeding
Aspirin vs warfarin in atherosclerotic intracranial stenosisNEJM, 20058131. There was no difference between warfarin and aspirin in preventing recurrent stroke in patients with significant atherosclerotic intracranial stenosis.
2. Warfarin was associated with a significantly higher incidence of major hemorrhage compared to the aspirin group.
The NINDS trial: Tissue plasminogen activator in acute ischemic stroke significantly improves functional outcomesNEJM, 19958081.     Treatment of acute ischemic stroke with tissue plasminogen activator within 3 hours of symptom onset significantly improves functional outcomes three months after the incident, when compared with placebo
2.     Tissue plasminogen activator is significantly associated with higher rates of symptomatic intracerebral hemorrhage
Computerized order system linked with increased pediatric mortalityPediatrics, 20057891. The use of a computerized physician order entry (CPOE) program in a large, tertiary pediatric hospital was associated with over 3 times increased risk of mortality when compared to patients admitted to the same center prior to CPOE implementation
2. CPOE implementation resulted in increased physician time placing medication orders as opposed to providing patient care and delays in medication administration as medications now were located in the hospital pharmacy, not at the bedside
The Rockall score: Risk assessment after acute upper gastrointestinal haemorrhageGut, 19967751. Age, shock, comorbidity, diagnosis, major stigmata of recent haemorrhage, and rebleeding were found to be independent predictors of mortality following acute upper gastrointestinal haemorrhage
The CARP trial: Preoperative revascularization prior to elective vascular surgeryNEJM, 20047711. In patients with stable coronary artery disease undergoing elective vascular surgery, preoperative revascularization does not significantly reduce short- or long-term mortality
2. Patients undergoing revascularization experience significant time delays prior to surgery
Parents define children’s oncology-related palliation and pain reliefNEJM, 20007661. When interviews with parents who lost children to cancer were compared to patient hospital records, researchers found that many children experienced substantial suffering toward the end of life with poorly managed symptoms
2. There was significant discordance between parent and physician reports of patient discomfort, with parents being significantly more likely to report patient symptoms than physicians
Antibiotic GBS prophylaxis linked to decreased early-onset neonatal infectionNEJM, 20007581. During the 1990-1998 study period, which included the 1996 initiation of national Group B Streptococcus guidelines, a significant, 65% decrease in early-onset neonatal disease was observed
2. During the study’s final year, an estimated 3900 early-onset neonatal GBS cases along with 200 early- and late-onset neonatal deaths were believed to have been prevented through the use of recommended antibiotic prophylaxis
Prophylactic penicillin and reduced septicemia in sickle cell patientsNEJM, 19867511. This randomized, placebo-controlled, double-blinded trial demonstrated an 84% reduction in the incidence of pneumococcal septicemia among patients with sickle cell taking prophylactic penicillin when compared to those taking placebo
2. Fifteen severe, Streptococcus pneumoniae-related infections occurred during the study with 13 occurring in patients taking placebo, 3 of which resulted in death. No patients taking prophylactic penicillin died during the study course
Artificial surfactant linked to significant improvement of RDSThe Lancet, 19807481. Among 10 infants treated for respiratory distress syndrome with artificial surfactant in this landmark trial, significant improvements in blood pressure, acid-base status, arterial oxygenation, and radiologic findings were observed
2. Infants also required significantly less oxygen therapy and ventilator pressure following surfactant administration
The EMPHASIS-HF trial: Eplerenone in mild systolic heart failureNEJM, 20117361. Eplerenone significantly reduces mortality in patients suffering from heart failure with reduced systolic function (LVEF≤30%, or 30-35% if QRS>130 ms) and mild symptoms (NYHA class II) when compared with placebo
2. The incidence of hyperkalemia was significantly higher in the eplerenone group
The POISE trial: Perioperative use of beta-blockersThe Lancet, 20087221.     The POISE trial was a randomized controlled trial exploring the effect of perioperative beta-blockers on cardiac death, nonfatal MIs, and nonfatal cardiac arrest
2.     Perioperative oral extended-release metoprolol was found to reduce the risk of nonfatal MI, while increasing the risk of stroke and mortality when compared to placebo
Tenofovir-emtricitabine more effective and safer than zidovudine-lamivudine in HIV treatmentNEJM, 20067141. A significantly higher percentage of patients taking tenofovir, emtricitabine, and efavirenz had HIV viral load <50 copies/mL than those taking zidovudine, lamivudine, and efavirenz
2. Significantly more patients discontinued medication in the zidovudine-lamivudine group due to adverse events than in the tenofovir-emtricitabine group
The ESPRIT trial: Aspirin with dipyridamole after cerebral ischemiaThe Lancet, 20066861. The combination of aspirin and dipyridamole was superior to aspirin alone in the secondary prevention of major vascular events
2. Patients on combination therapy were more likely to discontinue trial medication due to adverse effects
Adjuvant dexamethasone improves outcomes in adult bacterial meningitisNEJM, 20026831.     Treatment with dexamethasone reduces morbidity and mortality in adults with bacterial meningitis
2.     There is no significant difference in risk of adverse events with corticosteroid treatment
The ABCD2 score: Risk of stroke after TIAThe Lancet, 20076741. The ABCD2 score is a validated, seven-point, risk-stratification tool to identify patients at high risk of stroke following a TIA
Patients with scores ≥4 are at considerably higher risk of stroke in the 2-day period following a TIA, and may potentially require urgent intervention
The TRANSFORMS trial: Fingolimod vs interferon in multiple sclerosisNEJM, 20106621. Fingolimod significantly reduced the number of relapses as compared to interferon beta-1a over a one-year period
2. Fingolimod was associated with more transient bradycardia and a higher infection rate as compared to interferon
Risks associated with a Trial of Labor after Cesarean Delivery (TOLAC) NEJM, 20046551. Uterine rupture occurs in less than 1% of women undergoing TOLAC
2. The absolute risk of permanent neurological impairment in infants born to women undergoing TOLAC is <1% (0.46 per 1000 women)
The NLST trial: CT screening reduces lung cancer mortalityNEJM, 20116471. Low-dose computed tomography screening reduces lung cancer mortality when compared to screening with chest radiography
2. Screening for lung cancer with either modality resulted in very high false positive rates
The Wells DVT criteria: Clinical prediction model for deep vein thrombosisNEJM, 20036431.     The Wells DVT criteria are a validated clinical model for estimating pre-test probability of DVT
2.     D-dimer testing in outpatients can help inform the need for venous ultrasonography in the diagnosis of DVT
The HAS-BLED score: Bleeding risk in atrial fibrillationChest, 20106381. The HAS-BLED score is an easy to remember and easy to apply tool that has good predictive accuracy for the risk of major bleeding in patients with atrial fibrillation
2. Since its publication, the HAS-BLED score has been validated in a large cohort study of 7,329 patients
Low-lead exposure in childhood associated with worse cognitive performancePediatrics, 19925881. Among children exposed to lead early in life, serum lead levels at 24 months of age were significantly associated with decreased cognitive performance on measures of intelligence and educational achievement at 10 years old
2. Each 0.48 μmol/L (10 μg/dL) increase in serum lead at 24 months of age was associated with a 5.8 point decline in a measure of intelligence quotient and an 8.9 point decline in educational achievement score during cognitive testing at 10 years of age
Intravenous omeprazole after endoscopy reduces rebleeding in patients with peptic ulcersNEJM, 20005831.     After endoscopic treatment, intravenous omeprazole significantly reduces the risk of rebleeding in patients with peptic ulcers at 3, 7, and 30 days
Childhood febrile seizure characteristics associated with epilepsy diagnosisNEJM, 19765801. Through the inclusion of infants from the Collaborative Perinatal Project, this large, multicenter, prospective study found that children with febrile seizures, complex febrile seizures (seizures that were longer than 15 minutes in duration, occurred more than once in 24 hours, or had focal neurologic findings), and febrile seizures of earlier onset (before 6 months of age) were at increased risk of developing epilepsy when compared to individuals who had febrile seizures without these features
2. Abnormal performance on neurologic testing was linked to increased epilepsy risk
The STAR*D trials II: Switching antidepressantsNEJM, 20065671.     In cases where citalopram fails or cannot be tolerated, approximately 1 in 4 patients will experience remission of their depression symptoms by switching to sustained-release buproprion, sertraline, or extended-release venlafaxine
Early initiation of antiretroviral therapy significantly improves HIV survivalNEJM, 20095641.     The relative risk of death was significantly higher in patients who deferred antiretroviral therapy compared to those who initiated treatment early on
2.     This finding remained significant after adjustment for independent risk factors of age, history of injection drug use and HCV infection
Hepatocellular carcinoma screening reduces mortalityJournal of Cancer Research and Clinical Oncology, 20045591. Patients at high risk for hepatocellular carcinoma who underwent biannual screening with serum AFP levels and liver ultrasound were much more likely to be diagnosed with cancer in the earlier stages and receive curative treatment
2. Biannual screening for hepatocellular carcinoma leads to a significant reduction in 5-year mortality
The CORPERNICUS trial: Carvedilol in severe chronic heart failureCirculation, 20025571. Adding carvedilol to the management of patients with severe heart failure (NYHA Class III-IV and LVEF<25%) is associated with a 35% relative risk reduction in mortality
2. In this patient population, carvedilol is also associated with decreased risk of hospitalization and serious adverse effects, as well as improvement in symptoms
MMR vaccine not associated with autismNEJM, 20025501. Among children born in Denmark during a 7-year study period, no increase in risk of developing autism was seen in those who were vaccinated against measles, mumps, and rubella relative to unvaccinated children
The RE-COVER trial: Dabigatran is non-inferior to warfarin in treating acute venous thromboembolismNEJM, 20095491.     The RE-COVER trial demonstrates that treating acute venous thromboembolism with 6 months of dabigatran 150 mg twice daily is non-inferior to dose-adjusted warfarin to an INR of 2-3
2.     Though dabigatran therapy does not require INR monitoring, it is considerably more expensive than warfarin
The STAR*D trials I: Medication augmentation for depressionNEJM, 20065411.     In patients who have not experienced remission of depression despite vigorous treatment with an SSRI, augmentation of treatment by adding buproprion or buspirone can achieve remission in approximately 30% of patients
2.     There were no significant differences between the two groups in terms of remission rates
The Canadian CT Head Rule: A highly sensitive clinical decision rule for patients with minor head injuriesThe Lancet, 20015241.     The Canadian CT Head Rule consists of 7 predictor variables to assess the need for CT imaging in patients with minor head injuries
2.     This study demonstrates that the rule is highly sensitive and may help to reduce the number of CT scans ordered
The NASCET: Carotid endarterectomy for symptomatic stenosisNEJM, 19915161. Carotid endarterectomy, in addition to medical therapy, significantly reduces risk of major and fatal stroke in patients with symptomatic, high-grade (70-99%) carotid stenosis
The CARESS trial: Dual antiplatelet therapy superior to monotherapy in symptomatic carotid stenosisCirculation, 20054851. Dual antiplatelet therapy with clopidogrel and aspirin was associated with a significant reduction in microembolic events in patients with symptomatic carotid stenosis compared to aspirin alone
2. There was no significant difference between the two groups in the risk of bleeding
The Symplicity HTN-2 trial: Renal denervation in treatment-resistant hypertensionThe Lancet, 20104841. Renal denervation significantly reduces blood pressure in patients suffering from treatment-resistant hypertension
2. Renal denervation was not associated with a significantly higher rate adverse events in comparison to control
Laboratory values and treatment associated with DKA-related cerebral edemaNEJM, 20014781. Among children admitted to 1 of 10 medical centers for diabetic ketoacidosis management, elevated serum urea nitrogen concentrations and low partial pressures of carbon dioxide were associated with significant increases in risk of developing cerebral edema
2. Lack of pronounced serum sodium rise and use of bicarbonate for treatment were also associated with significantly increased cerebral edema risk
Endoscopic biliary drainage in acute cholangitisNEJM, 19924711. For patients with severe acute cholangitis due to choledocholithiasis, endoscopic biliary drainage reduces hospital mortality compared to surgical decompression
2. Endoscopic biliary drainage is associated with fewer post-treatment complications compared to surgical decompression, although the decrease was not statistically significant for all types of complications
Magnesium sulfate in torsade de pointesCirculation, 19884661. Intravenous magnesium sulfate was effective at acutely terminating torsade de pointes
2. intravenous magnesium sulfate was not effective in terminating other ventricular tachycardias not associated with QT prolongation
Vancomycin superior to metronidazole for severe C. difficile-associated diarrheaCID, 20074591. Metronidazole and vancomycin had similar efficacy in treating mild cases of Clostridium difficile-associated diarrhea (CDAD)
2. Vancomycin was superior to metronidazole in treating severe cases of CDAD
Fidaxomicin vs. vancomycin in C. difficile infectionNEJM, 20114521. Fidaxomicin is non-inferior to vancomycin in achieving clinical cure of C. difficile infection
2. Fidaxomicin therapy significantly reduces the rate of recurrence and significantly increases the rate of global cure of C. difficile infection when compared with vancomycin therapy
The RAVE trial: Rituximab for ANCA-associated vasculitisNEJM, 20104421. Rituximab is non-inferior to cyclophosphamide in inducing remission of severe ANCA-associated vasculitis
2. There were no significant differences between the two groups in the rate of total, serious, or non-disease-related adverse events
Prone sleeping position and heavy bedding associated with SIDSBMJ, 19904321. In a study of sudden death in infants compared to matched controls, a significant increase in risk of death from unknown causes also called sudden infant death syndrome (SIDS) was observed among infants who slept prone as opposed to sleeping on their side or supine
2. A significant increase in SIDS risk was seen among infants who were wrapped in more blankets, wore heavier clothing to bed, or were in a home that was heated overnight when compared to control infants
Fecal transplantation in recurrent C. difficile infectionNEJM, 20134281. Treating recurrent C. difficile infection with infusion of donor feces resulted in significantly higher cure rates than treating with vancomycin-alone or vancomycin with bowel lavage
2. Adverse events immediately after feces infusion included diarrhea, cramping, and belching
The DIG trial: Digoxin associated with significant decrease in hospitalizations in patients with systolic heart failureNEJM, 19974251.     Digoxin significantly reduced hospitalizations but had no significant effect on mortality when used to treat patients with systolic heart failure
2.     Digoxin was most beneficial in patients with low ejection fractions (<0.25) and poor functional status (NYHA III-IV)
The ACTIVE trial: Dual antiplatelet therapy in atrial fibrillationNEJM, 20094151.     In patients with atrial fibrillation who require anticoagulation but cannot tolerate warfarin, dual anti-platelet therapy may be a potential alternative
2.     Clopidogrel 75 mg PO daily, in addition to daily aspirin, significantly reduced the incidence of stroke and increased the incidence of major bleeding in patients with atrial fibrillation when compared to treatment with aspirin alone
The RIVAL trial: Radial vs femoral artery access for PCIThe Lancet, 20114141. The composite outcome of death, myocardial infarction, stroke, and non-CABG-related major bleeding did not differ between radial and femoral access for percutaneous coronary intervention
2. Radial artery access is associated with a significantly lower rate of vascular complications compared to femoral access
The COGENT trial: Omeprazole with dual anti-platelet therapy reduces upper gastrointestinal bleedingNEJM, 20103901.     Concomitant administration of omeprazole decreases upper gastrointestinal bleeding in patients with coronary artery disease receiving dual anti-platelet therapy (i.e., aspirin and clopidogrel)
2.     There is no significant increase in the risk of cardiovascular events with concomitant use of clopidogrel and omeprazole, a concern raised by previous observational studies
CT scans associated with increased risk of malignancyThe Lancet, 20123811. Through a retrospective cohort analysis of children and young adults without previous malignancy, patients exposed to multiple CT scans were found to be at over 3 times increase risk of developing leukemia and brain tumors
The ICTUS trial: Early invasive or selectively invasive management for ACSNEJM, 20053521. There was no significant difference in the composite rate of death, nonfatal myocardial infarction, or rehospitalization for angina in patients with acute coronary syndromes treated with early invasive versus selectively invasive strategies
2. Myocardial infarction was significantly more frequent in the early invasive management group but rehospitalization was significantly less frequent in this group
Early infant CF diagnosis associated with improved nutritional statusPediatrics, 20013271. Among infants randomized to undergo either newborn screen with cystic fibrosis (CF) testing included or undergo normal pediatric surveillance, those who underwent newborn screen were diagnosed significantly earlier
2. Infants diagnosed based on surveillance were significantly more likely to be severely malnourished compared to those diagnosed by newborn screen
The SOAP-II trial: First-line vasopressor for shock managementNEJM, 20103201. There were no significant differences in 28-day, 6-month, or 12-month mortality when comparing dopamine and norepinephrine as first-line vasopressors in managing shock
2. Dopamine was associated with a significantly higher rate of arrhythmias, as well as severe arrhythmias that required stopping the study drug, when compared to norepinephrine
The EINSTEIN-DVT trial: Rivaroxaban in acute deep-vein thrombosisNEJM, 20103201. Rivaroxaban is non-inferior to standard therapy of enoxaparin and vitamin K antagonist in treating acute, symptomatic deep-vein thrombosis
2. The risk of major and clinically relevant nonmajor bleeding was not significantly different when comparing rivaroxaban with standard therapy
The PANTER trial: Open necrosectomy vs step-up approach for necrotizing pancreatitisNEJM, 20102841. A minimally invasive step-up approach significantly reduced the rate of major complications as compared to open necrosectomy in patients with necrotizing pancreatitis
The RACE-II trial: Lenient vs. strict rate-control in atrial fibrillationNEJM, 20102621. Lenient rate-control was found to be non-inferior to strict rate-control in managing patients with atrial fibrillation
2. Compared to strict rate-control, lenient rate-control could be achieved with lower doses of medication and fewer medications
Dexamethasone effective as initial therapy for immune thrombocytopenic purpuraNEJM, 20032591. Of 125 patients with newly diagnosed immune thrombocytopenic purpura, 106 (85%) had an initial response to high-dose dexamethasone therapy
2. Half of the 106 patients with an initial response to high-dose dexamethasone had a sustained response after six months of follow-up
Early TIPS in cirrhosis and variceal bleedingNEJM, 20102311. In patients with severe liver disease and variceal bleeding, early transjugular intrahepatic portosystemic shunt (TIPS) significantly reduced the rate of treatment failure, length of hospitalization, and mortality
2. Early TIPS was not associated with a difference in the rate of adverse events compared to control
The EVAR I trial: Endovascular vs. open abdominal aortic aneurysm repairNEJM, 20102271. The EVAR I trial compared the safety and efficacy of endovascular and open abdominal aortic aneurysm repair
2. There were no significant differences in all-cause mortality between the two groups
3. The endovascular group experienced significantly higher rates of graft-related complications and reinterventions
Initial trial of conservative management of splenic injuryJournal of Pediatric Surgery, 19712021. The conservative, symptomatic management of 16 patients following assumed splenic injury from blunt abdominal trauma resulted in normalization of hemodynamic stability within 2 days of hospital admission, complete normalization of clinical examination by 2 weeks post-discharge, and no hospital readmissions
2. This approach to splenic injury management was later supported by future investigations, eventually leading to the acceptance of conservative management as standard of care
Antibiotic prophylaxis not associated with UTI prevention in childrenThe Journal of Urology, 20082011. Among children recruited following febrile urinary tract infection (UTI) and randomized to receive either antibiotics or no medication, no significant difference in UTI recurrence was noted between groups
2. Male children and those with grade III vesicoureteral reflex had significant reductions in subsequent UTIs if treated with prophylactic antibiotics
Prediction rules for children at low risk of clinically-important traumatic brain injuryThe Lancet, 20091921. Absence of six established predictors was found to have close to 100% negative predictive value for clinically-important traumatic brain injury (ciTBI) when applied to head trauma patients under 18 years of age
2. An algorithm was proposed, applying these predictors, in order to prevent physicians from using unnecessary computed tomography (CT) in pediatric patients at low risk for ciTBI
The CRASH-II trial: Tranexamic acid in trauma patientsThe Lancet, 20101901. Tranexamic acid significantly reduces all-cause mortality in trauma patients with significant hemorrhage
2. There were no significant differences between the tranexamic acid and placebo groups with regards to the incidence of vascular occlusive events or the need for transfusion or surgery
The ATLAS trial: Duration of adjuvant tamoxifen in ER-positive breast cancerThe Lancet, 20131711. Among women with early ER-positive breast cancer, continuing adjuvant tamoxifen for 10 years versus stopping at 5 years after diagnosis significantly reduced breast cancer recurrence, breast cancer mortality, and overall mortality
2. Patients treated with adjuvant tamoxifen for 10 years had significantly higher risk of endometrial cancer and pulmonary embolism
The PRECOMBAT trial: PCI vs. CABG in left main coronary artery stenosisNEJM, 20111621. For patients with left main coronary artery stenosis, angioplasty with sirolimus-eluting stents was noninferior to coronary artery bypass grafting with respect to subsequent cardiovascular or cerebrovascular events
2. PCI patients experienced a significantly higher incidence of ischemia-driven target vessel revascularization compared to CABG patients
3. Because of low event rates, the study was underpowered
The PIVOT trial: Radical prostatectomy versus observationNEJM, 20121601. Prostatectomy did not significantly reduce all-cause mortality or prostate-cancer mortality when compared to observation
2. These findings support conservative management for men with localized prostate cancer, especially for those with PSA values less than 10 ng/mL and low-risk disease
Decrease in symptom severity linked to infliximab Crohn’s treatmentThe Journal of Pediatrics, 20001521. The severity of Crohn’s disease as assessed by the Pediatric Crohn’s Disease Activity Index in patients recruited from 3 pediatric specialty centers decreased significantly over the course of a 12-week treatment regimen with infliximab
2. All patients were on corticosteroids at the start of the study; however, steroid administration decreased significantly over the course of the investigation
The PLCO trial 2: Flexible sigmoidoscopy in colon cancer screeningNEJM, 20121511. Screening with flexible sigmoidoscopy is associated with a significant decrease in colon cancer incidence in the distal and proximal colon
2. Screening with flexible sigmoidoscopy is associated with a significant decrease in colon cancer mortality in the distal colon only
The EINSTEIN-PE trial: Rivaroxaban to treat pulmonary embolismNEJM, 20121481. Rivaroxaban, an oral factor Xa inhibitor, was non-inferior to standard anticoagulation therapy (i.e. low-molecular weight heparin and a vitamin K antagonist) in the prevention of recurrent thromboembolism following a pulmonary embolism
2. The rate of major bleeding was significantly lower with rivaroxaban than with standard anticoagulant therapy
RSV positivity associated with reduced serious bacterial infection riskPediatrics, 20041261. RSV-positive infants were significantly less likely to have an SBI than those who tested negative (7% vs. 12.5%, RR 0.6, p < .05) and at reduced risk for SBI (OR 0.58)
2. Infants <28 days old were significantly more likely to have an SBI than older infants (10.1% vs. 5.5%)
Clinical prediction rule stratifies pediatric bacterial meningitis riskPediatrics, 20021261. A Bacterial Meningitis Score of 0 accurately identified all children with aseptic meningitis in the study’s validation group
2. The negative predictive value of a BMS score of 0 was 100% with a specificity of 73% in predicting bacterial meningitis. A BMS score of >2 was found to have a sensitivity and positive predictive value of 87% in predicting bacterial meningitis
Symptom-triggered benzodiazepine treatment for alcohol withdrawalArchives of Internal Medicine, 20021191. For patients withdrawing from alcohol, a symptom-triggered pharmacologic therapy may decrease detoxification time without compromising the safety or comfort of the patient
2. Symptom-triggered individualized benzodiazephine administration reduces the intensity and duration of oxazepam use during withdrawal treatment
Initial guidelines for prolonged fever in childrenPediatrics, 19751121. Among 100 children presenting to one children’s hospital for prolonged febrile illnesses, the majority of cases were of an infectious etiology (52 cases)
2. Significantly more febrile illnesses in younger children were due to infectious causes, while those due to inflammatory conditions were significantly more likely to occur in older children
The LACTATE trial: Early lactate-guided therapy in intensive care patientsAJRCCM, 20101101. Therapy aimed at reducing lactate levels by 20% every 2 hours during the first 8 hours of ICU admission led to decreased in-hospital mortality and shorter ICU stays
2. Patients in the early lactate-guided therapy group received more fluids and started on vasopressors earlier than in the control group, but did not have a faster reduction rate of lactate levels
Transcutaneous bilirubinometry linked to decreased serum testing and costsPediatrics, 1997691. In a 2 year study period, researchers observed a significant decrease in the number of infants undergoing bilirubin serum testing after introduction of a transcutaneous bilirubinometer in one hospital’s newborn nursery
2. The use of the transcutaneous instrument decreased hospital costs by $1625 each year when compared to serum bilirubin measurements
The DEFINE trial: BG-12 reduces relapse rate in multiple sclerosisNEJM, 2012631. BG-12 (dimethyl fumarate) significantly reduces relapse rates, disability progression, and image detectable lesion load over a two-year period
2. BG-12 is associated with higher rates of transient flushing and gastrointestinal events
The EVAR II trial: Endovascular approach when unfit for open aortic aneurysm repairNEJM, 2010501. The EVAR II trial compared endovascular abdominal aortic aneurysm repair with no intervention in patients unsuitable for the open procedure
2. There were significantly fewer aneurysm-related deaths in the endovascular group, compared to no intervention
3. The rates of complication and reintervention were similar to the rates observed in EVAR I
Isolated thrombocytopenia uncommon in children treated for ALLPediatrics, 1989391. Among 2239 pediatric patients diagnosed with acute lymphoblastic leukemia, no child met criteria for isolated thrombocytopenia as evidenced by complete blood count, peripheral blood smear, and hepatosplenomegaly on physical exam
Standardized cost-effective model for diagnosing and treating febrile infantsPediatrics161. Following implementation of an evidence-based care process model for evaluation and treatment of febrile infants, children were found to have significantly shorter hospital stays, reduced risk of a missed serious bacterial infection, and underwent significantly more laboratory testing. Despite this increase in testing, hospital costs decreased significantly over the study course
Clinical decision rule associated with 40% decrease in ALTE-related hospital admissionsPediatric Emergency Care, 201251. Abnormal physical exam findings, prematurity, cyanosis, absence of upper respiratory infection (URI), and absence of choking were significant predictors of the need for significant intervention among study participants admitted for hospitalization following apparent life-threatening events (ALTEs)
2. A clinical decision rule (CDR) was designed and validated that would have reduced ALTE-related hospital admission in this sample by 40%