strmst2 and strmst2pw: New commands to compare survival curves using the restricted mean survival time
Abstract. We present strmst2, a new command to implement k-sample
comparisons using the restricted mean survival time (RMST) as the summary
measure of the survival-time distribution. Unlike model-based summary measures
such as the hazard ratio, the validity of which relies on the adequacy of the
proportionalhazards assumption, the measures based on the RMST (that is, the
difference in RMST, the ratio of RMST, and the ratio of the restricted mean
time lost) provide more robust and clinically interpretable results about the
between-group differences. strmst2 performs analysis of covariance-type
adjusted analyses for k-sample comparisons as well as the corresponding
unadjusted analyses. Pairwise comparisons for the adjusted analyses are
summarized using the new postestimation command strmst2pw. We briefly
describe the issues of the hazard ratio, introduce details of the method for
the RMST, and then illustrate how to use the new commands.
View all articles by these authors:
Angel Cronin, Lu Tian, Hajime Uno
View all articles with these keywords:
strmst2, strmst2pw, restricted mean survival time, restricted mean time lost, survival analysis, time-to-event data
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