作者: D. Bernstein , S.W. Lagakos
DOI: 10.1080/00949657808810249
关键词: Mathematics 、 Fortran subroutine 、 Risk groups 、 Power (physics) 、 Statistics 、 Sample size determination 、 Clinical trial 、 Subroutine
摘要: This paper presents an ISO FORTRAN subroutine for determining the required sample size or power in a stratified clinical trial. The algorithm permits post-accrual follow up period, censored observations, patient strata risk groups, and unequal case allocation schemes. An example which illustrates use of is provided.