Sample Size Calculator

All methods

Clinical trial designs

Use when the trial objective, not the outcome type, drives the calculation — showing a treatment is better, showing it is not unacceptably worse, or showing two treatments are interchangeable.

3 methods

Clinical trial designs

  1. 17 Superiority trial
  2. 18 Non-inferiority trial
  3. 19 Equivalence trial (TOST)