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Evidence at Becker: Educational Resources

Resources and services to support evidence-based medicine and evidence-based practice at Washington University in St. Louis.


Introduction to Evidence-Based Medicine from Duke University Medical Center Library and Health Sciences Library, UNC-Chapel Hill 

Introduction to Evidence-Based Medicine from Boston University

Searching the Literature for Evidence-Based Medicine from UCSF

Statistical Testing Thresholds from Alan Schwartz
A graphical demonstration like the above, but written in terms of statistical test theory (type I and II error).

PS: Power Sample and Size Calculation from Dale Plummer and William Dupont and Vanderbilt

Diagnostic Test Cutoffs from Alan Schwartz
A graphical demonstration of the effect of changing cutoff scores on sensitivity and specificity of a test.


Search the Literature


Clinical Reasoning Toolkit from the Society to Improve Diagnosis in Medicine


Appraise the Literature

Grading the Evidence

Onlilne Tables and Scales



Classes and Consultations

You and your department, class, or work group are always welcome to contact Becker Medical Librarians for consultations and classes for in-person demonstrations of how to use any information tool or information technique.


Debbie Thomas

Associate Director, Health Information Services
ph: 314-362-9729



Diagnostic Test Calculator from Alan Schwartz
This calculator can determine diagnostic test characteristics (sensitivity, specificity, likelihood ratios) and/or determine the post-test probability of disease given given the pre-test probability and test characteristics. Given sample sizes, confidence intervals are also computed.

Risk Reduction Calculator from Alan Schwartz
Given information about the probability of an outcome under control and experimental treatments, this calculator produces measures of risk increase/decrease and number needed to treat or harm, including confidence intervals. If some patients were lost to follow-up, the calculator provides estimates for several different scenarios.