Skip to Main Content

Evidence-Based Practice

This guide is designed to assist with Evidence Based Practice in the health sciences.

Explaining the Results (videos & articles)

Number Needed to Treat

How to Calculate the Number Needed to Treat - Terry Shaneyfelt (3:48)

The NNT Tutorial - Graham (3:56)

Absolute Risk Reduction, Relative Risk Reduction, Relative Risk

How to Calculate Relative Risk - Terry Shaneyfelt (3:14)

Basic Statistics for Clinicians: Assessing the effects of treatment: Measures of association
CMAJ. 1995 Feb 1;152(3):351-7. Erratum in: Can Med Assoc J 1995 Mar 15;152(6):813.

Odds Ratios

Understanding Odds Ratios - Gordon Guyatt (21:42)

How to Calculate an Odds Ratio - Terry Shaneyfelt (3:17)

Intention-to-Treat

Intention-to-treat analysis: What is it and why is it important? - Terry Shaneyfelt (4:43)

What is Intention-to-Treat Analysis? - Allen Shaughnessy (1:11)

Forest Plots

How to Interpret a Forest Plot - Terry Shaneyfelt (5:32)

Interpreting and Understanding Meta-Analysis Graphs: A practical guide - Karin Reed
Aust Fam Physician. 2006 Aug;35(8):635-8. PubMed PMID: 16894442

Confidence Intervals

Statistics Corner: Confidence Intervals - Terry Shaneyfelt

Basic Statistics for Clinicians: Interpreting Study Results: Confidence Intervals (5:27)
CMAJ. 1995 Jan 15;152(2):169-73.

Sensitivity, Specificity, and Likelihood Ratios

Sensitivity & Specificity - H. Gilbert Welch (8:12)

How to Calculate Sensitivity - Terry Shaneyfelt (3:51)

How to Calculate Specificity - Terry Shaneyfelt (3:27)

What are Likelihood Ratios & How Are They Used - Terry Shaneyfelt (10:10)