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      Post hoc power analysis: an idea whose time has passed?

      Pharmacotherapy
      Confidence Intervals, Humans, Periodicals as Topic, Randomized Controlled Trials as Topic, Reproducibility of Results, Sample Size

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          Abstract

          Using a hypothetical scenario typifying the experience that authors have when submitting manuscripts that report results of negative clinical trials, the pitfalls of a post hoc analysis are illustrated. We used the same scenario to explain how confidence intervals are used in interpreting results of clinical trials. We showed that confidence intervals better inform readers about the possibility of an inadequate sample size than do post hoc power calculations.

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          Journal
          11310512
          10.1592/phco.21.5.405.34503

          Chemistry
          Confidence Intervals,Humans,Periodicals as Topic,Randomized Controlled Trials as Topic,Reproducibility of Results,Sample Size

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