Evidence-based Medicine

9/20/00


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Table of Contents

Evidence-based Medicine

Study Design

Typical Data Collection

Randomized Trial

Randomized Clinical Trials

Cohtort Study

Cohort studies

Case-Control Study

Case-control studies

Cross-sectional Study

Cross-sectional studies

Statistical Summaries

GERD Treatment: 2 x 2 Table

Odds Ratios (OR)

Odds Ratio

Relative Risk (RR) (also called Risk Ratio)

Relative Risk (Risk Ratio)

Relative Rate Reduction (RRR)

Relative Rate Reduction

Absolute Rate Reduction (ARR)

Absolute Rate Reduction

Number Needed to Treat (NNT)

Number Needed to Treat

Critical Appraisal

Example Scenario

PICO-Formatted Question

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Author: Robert W. Baer, Ph.D.