Survminer – arrange multiple ggsurvplot and ggadjustedcurves

April 6, 2023

I would like to combine survminer plots (like an arrange_ggsurvplots() ): ggsurvplot (for Kaplan Meier model) and ggadjustedcurves (for Cox).

library(survminer)
fitKM  <- survfit(Surv(time, status) ~ sex, data = lung)
fitCox <- coxph(Surv(time, status) ~ sex, data = lung)
p1 = ggsurvplot(fitKM, data = lung)
p2 = ggadjustedcurves(fitCox, data = lung,variable = "sex")

When I do :

arrange_ggsurvplots(x = list(p1,p2))

I have

Error in FUN(X[[i]], ...) : An object of class ggsurvplot is required.

How can I do this ?

>Solution :

A ggsurvplot object is a list where the plot of the survival curves is stored as an element named plot which is ggplot object, whereas ggadjustedcurves returns a ggplot object by default.

Hence, one option to combine both plots would be to use one of the available options for ggplot objects like e.g. patchwork:

library(survminer)
library(survival)

fitKM  <- survfit(Surv(time, status) ~ sex, data = lung)
fitCox <- coxph(Surv(time, status) ~ sex, data = lung)
p1 = ggsurvplot(fitKM, data = lung)
p2 = ggadjustedcurves(fitCox, data = lung, variable = "sex")

library(patchwork)

p1$plot + p2