Number needed to treat
Revision as of 11:39, 7 November 2023 by Editor iHTS (talk | contribs) (Created page with "The number of subjects treated per subject with a favourable outcome. '''Note:''' It is the inverse of absolute risk reduction (1 ÷ absolute risk reduction). Thus, if the results of a study indicate that the probability of death in a control group is 25% and the probability of death in a treatment group is 10%, the number needed to treat would be 1.0 ÷ (0.25 - 0.10) = 6.7, therefore 7 subjects. Related concepts: risk difference, absolute risk reduction, rel...")
The number of subjects treated per subject with a favourable outcome.
Note: It is the inverse of absolute risk reduction (1 ÷ absolute risk reduction). Thus, if the results of a study indicate that the probability of death in a control group is 25% and the probability of death in a treatment group is 10%, the number needed to treat would be 1.0 ÷ (0.25 - 0.10) = 6.7, therefore 7 subjects.
Related concepts: risk difference, absolute risk reduction, relative risk reduction and odds ratio