Tips for learners of evidence-based medicine: 1. Relative risk reduction, absolute risk reduction and number needed to treat

Barratt, Alexandra; Wyer, Peter C.; Hatala, Rose; McGinn, Thomas; Dans, Antonio L.; Keitz, Sheri; Moyer, Virginia; Guyatt, Gordon
August 2004
CMAJ: Canadian Medical Association Journal;8/17/2004, Vol. 171 Issue 4, p353
Academic Journal
Presents several measures of effect, such as relative risk reduction, absolute risk reduction and number needed to treat, to help clinicians understand and use them. Factors to consider in understanding risk and risk reduction; Ways to balance the benefits and adverse effects of risk reduction in individual patients; Calculation and use of the number needed to treat in considering the consequences of treating or not treating.


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