get_schoenfeld {easysurv}

Extract Schoenfeld Residuals

Description

This function extracts Schoenfeld residuals from a fitted cox.zph object and formats them into a tidy data frame.

Usage

get_schoenfeld(fit_zph)

Arguments

fit_zph

An object of class cox.zph produced by the cox.zph function, representing the Schoenfeld residuals of a Cox proportional hazards model.

Value

A tibble with the Schoenfeld residuals in long format, containing the columns:

time

The time variable from the Cox model.

transform

The transformation applied to the time variable.

variable

The variable names from the Cox model for which residuals are calculated.

residual

The Schoenfeld residuals for each variable at each time point.

Examples

library(survival)
test_fit <- survival::coxph(survival::Surv(time, status) ~ sex, data = lung)
test_fit_zph <- survival::cox.zph(test_fit)
get_schoenfeld(test_fit_zph)