Open AccessDesign and analysis of randomized clinical trials requiring prolonged observation of each patient. II. Analysis and examples
Author(s) -
Richárd Pető,
M. C. Pike,
P. Armitage,
Norman E. Breslow,
Duncan Cox,
S V Howard,
Nathan Mantel,
Kerri McPherson,
Julian Peto,
P. G. Smith
Publication year - 1977
Publication title -
british journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.833
H-Index - 236
eISSN - 1532-1827
pISSN - 0007-0920
DOI - 10.1038/bjc.1977.1
Subject(s) - randomized controlled trial , log rank test , clinical trial , medicine , survival analysis , statistical analysis , research design , medical physics , statistics , surgery , mathematics
Part I of this report appeared in the previous issue (Br. J. Cancer (1976) 34,585), and discussed the design of randomized clinical trials. Part II now describes efficient methods of analysis of randomized clinical trials in which we wish to compare the duration of survival (or the time until some other untoward event first occurs) among different groups of patients. It is intended to enable physicians without statistical training either to analyse such data themselves using life tables, the logrank test and retrospective stratification, or, when such analyses are presented, to appreciate them more critically, but the discussion may also be of interest to statisticians who have not yet specialized in clinical trial analyses.