Number Needed to Treat

- How to calculate the number-needed-to-treatTerry Shaneyfelt video (3 min)
- The NNT TutorialGraham Walker video (4 min)
- Number needed to treatPhillip Sedgewick. BMJ 2010;341:c5614

Absolute Risk Reduction, Relative Risk Reduction, Relative Risk

- How to calculate a relative risk.Terry Shaneyfelt video (3 min)
- Basic Statistics for Clinicians: Assessing the effects of treatment: measures of associationCMAJ. 1995 Feb 1;152(3):351-7. Erratum in: Can Med Assoc J 1995 Mar 15;152(6):813.

Odds Ratios

- Gordon Guyatt explaining odds ratiosvideo (21 min)
- How to calculate an odds ratioTerry Shaneyfelt video (3 min)
- Odds ratiosPhilip Sedgwick. BMJ 2010;341:c4414

Intention-to-Treat

- Intention-to-treat analysis - What it is and why is it important?Terry Shaneyfelt video (5 min)
- What is intention-to-treat analysis?Allan Shaughnessy video (1 min)
- What is the intention-to-treat analysis?Philip Sedgewick BMJ 2013;346:f3662

Forest Plots

- How to interpret a forest plot.Terry Shaneyfelt video (5 min)

- Interpreting and Understanding Meta-Analysis Graphs: A Practical GuideAust Fam Physician. 2006 Aug; 35(8):635-8. PubMed PMID: 16894442

Confidence Intervals

- Confidence intervalsTerry Shaneyfelt video (5 min)

Sensitivity, Specificity and Likelihood ratios

- Sensitivity & specificityH. Gilbert Welch video (8 min)
- How to calculate sensitivityTerry Shaneyfelt video (4 min)
- How to calculate specificityTerry Shaneyfelt video (3 min)
- What are likelihood ratios and how are they usedTerry Shaneyfelt video (10 min)

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- Interactive NomogramWorks best with Internet Explorer. Requires Shockwave Player.

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- The Good Clinical Practice guideline: a bronze standard for clinical researchLancet 2005; 366: 172–74