GenTwoArmsTrialSize

Two arms clinical trials required sample size is calculated in the comprehensive parametric context. The calculation is based on the type of endpoints(continuous/binary/time-to-event/ordinal), design (parallel/crossover), hypothesis tests (equality/noninferiority/superiority/equivalence), trial arms noncompliance rates and expected loss of follow-up. Methods are described in: Chow SC, Shao J, Wang H, Lokhnygina Y (2017) doi:10.1201/9781315183084, Wittes, J (2002) doi:10.1093/epirev/24.1.39, Sato, T (2000) doi:10.1002/1097-0258(20001015)19:19<2689::aid-sim555>3.0.co;2-019:19%3C2689::aid-sim555%3E3.0.co;2-0), Lachin J M, Foulkes, M A (1986) doi:10.2307/2531201, Whitehead J(1993) doi:10.1002/sim.4780122404, Julious SA (2023) doi:10.1201/9780429503658.

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