Example SPSS syntax

Deze pagina lezen in het Nederlands.

This page was translated from the Dutch-language original using AI and has not been fully reviewed. Where the two differ, the Dutch version takes precedence.

Graphically testing the proportional hazards assumption in a Cox proportional hazards model

Variables:

survt -> follow-up time per patient

status -> status (1=event, 0=censored)

treatment -> treatment (1=treatment A, 2=treatment B)

gender -> sex (m/f)

age -> age (continuous)

With the following syntax the PH assumption for the variable gender could be tested:

COXREG survt

/STATUS=status(1)

/STRATA=gender

/CONTRAST (treatment)=Indicator(1)

/METHOD=ENTER age treatment

/PLOT LML

/CRITERIA=PIN(.05) POUT(.10) ITERATE(20).

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