New Statistical Calculators on

Now available on ClinCalc – sample size and post-hoc power calculators!

Sample Size Calculator

Prior to designing a trial, authors must determine how many subjects should be included in a trial in order to have adequate statistical power.  There are a variety of different equations depending on the trial design and the type of outcome being measured.  Check out the ClinCalc Sample Size Calculator.

Post-hoc Power Calculator

Following the completion of a trial, authors (or reviewers) may want to calculate the statistical power of a trial.  Although there are pitfalls in using post-hoc power analysis, which are described in the article, post-hoc power is commonly used in medical literature.  Check out the ClinCalc Post-hoc Power Calculator.

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