pspline

[Alina Vodonos]

Dear All,

My question is related to the "pspline" package

i need to performe a coxph model with 5 degrees of freedom for "temp" variable

is the "pspline"  right package for me if i want a natural spline?

the model assumes:

mod<-coxph(formula = Surv(Time, Case) ~ variable1 + pspline(temp,5)+variable3+strata(variable4), 

           data = X)

summary(mod) 

thank you!

Alina