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EBM Resource Center

Risk/Odds

Shaneyfelt, T. (2013, February 6). How To Calculate Relative Risk Reduction [Video file]. Retrieved from https://youtu.be/oe4NqGTZOQo

Risks/Odds Resources:

  • Shaneyfelt, T. (2013, February 20). How to Interpret and Use Relative Risk and an Odds Ratio [Video file]. Retrieved from https://youtu.be/FZzm3-RRlI4
  • McMaster Evidence-Based Practice Workshops. (2014, April 15). understanding odds ratios [Video file]. Retrieved from https://youtu.be/fkWJWKu0FUc
  • Sedgwick, P.  (2010). Odds ratios. BMJ, 341, c4414. doi:10.1136/bmj.c4414
  • Barratt A., Wyer, P.C., Hatala, R., McGinn T., Dans, A.L., Keitz, S.,...Guyatt, G. for the Evidence-Based Medicine Teaching Tips Working Group. (2004). Tips for learners of evidence-based medicine: 1. relative risk reducation, absolute risk and number needed to treat. Canadian Medical Association Journal, 171(4), 353-358. doi:10.1503/cmaj.1021197

Number Needed to Treat (NNT)

Shaneyfelt, T. (2013, February 22). How To Calculate The Number Needed to Treat [Video file]. Retrieved from https://youtu.be/M16SqIMqVto

Number Needed to Treat (NNT) Resources:

  • Sedgwick, P.  (2010). Number needed to treat. BMJ, 341, c5614. doi:10.1136/bmj.c5614
  • CEBM. (2014, March 4). Number Needed to Treat (NNT) [Blog post]. Retrieved from https://www.cebm.net/2014/03/number-needed-to-treat-nnt/
  • Barratt A., Wyer, P.C., Hatala, R., McGinn T., Dans, A.L., Keitz, S.,...Guyatt, G. for the Evidence-Based Medicine Teaching Tips Working Group. (2004). Tips for learners of evidence-based medicine: 1. relative risk reducation, absolute risk and number needed to treat. Canadian Medical Association Journal, 171(4), 353-358. doi:10.1503/cmaj.1021197

Intention-to-Treat Analysis

Shaneyfelt, T. (2013, January 10). Intention-to-treat analysis: What is it and why is it important? [Video file]. Retrieved from https://youtu.be/nnxg0FJwPjY

Intention-to-Treat Analysis Resources:

Sensitivity, Specificity, & Likelihood Ratios

Shaneyfelt, T. (2012, November 10). How To Calculate Sensitivity [Video file]. Retrieved from https://youtu.be/09yzDkXcZNM

Shaneyfelt, T. (2012, November 10). How To Calculate Specificity [Video file]. Retrieved from https://youtu.be/z0JlSrsW3Ns

Sensitivity, Specificity, and Likelihood Ratio Resources:

Confidence Intervals

Shaneyfelt, T. (2012, November 16). Statistics Corner: Confidence Intervals [Video file]. Retrieved from https://youtu.be/llXEGuxvh28

Confidence Intervals Resources:

  • Montori, V.M., Kleinbart, J., Newman, T.B., Keitz, S., Wyer, P.C., Moyer, V., & Guyatt, G. for the Evidence-Based Medicine Teaching Tips Working Group. (2004). Tips for learners of evidence-based medicine: 2. measures of precision (confidence intervals). Canadian Medical Association Journal, 171(6), 611-615. doi:10.1503/cmaj.1031667

Forest Plots/Systematic Reviews

Shaneyfelt, T. (2013, March 25). How to Interpret a Forest Plot [Video file]. Retrieved from https://youtu.be/py-L8DvJmDc

Forest Plots/Systematic Review Resources:

  • Ried, K. (2006). Interpreting and understanding meta-analysis graphs--a practical guide. Australian Family Physician, 35(8), 635-638. Retrieved from https://www.racgp.org.au/afp/
  • Hatala, R., Keitz, S., Wyer, P., & Guyatt, G. for the Evidence-Based Medicine Teaching Tips Working Group. (2005). Tips for learners of evidence-based medicine: 4. assessing heterogeneity of primary studies in systematic reviews and whether to combine their results. Canadian Medical Association Journal, 172(5), 661-665. doi:10.1503/cmaj.1031920

EBM Calculators