Skip to main content

Advertisement

Table 2 Statistical software

From: Variables with time-varying effects and the Cox model: Some statistical concepts illustrated with a prognostic factor study in breast cancer

  R/Splus © SAS © SPSS © Stata ©
Graphical checks survfit function lifetest procedure Survt command sts command
Time-by-covariate interactions programming required. phreg procedure (definition of interactions)/test statement. time program command (definition of interactions)/cox reg command. tvc option/stcox command
Scaled Schonfeld residuals cox.zph function phreg procedure/ressch option Not directly available/programming required stphtest command
Cumulative residuals Timereg/gof libraries/cum.residuals function phreg procedure/assess statement/ph option Not directly available/programming required Not directly available/programming required