Median of Survival Curves
Returns the median survival with upper and lower confidence limits for the median at 95% confidence levels.
surv_median(fit, combine = FALSE)
fit |
A survfit object. Can be also a list of survfit objects. |
combine |
logical value. Used only when fit is a list of survfit objects. If TRUE, combine the results for multiple fits. |
Returns for each fit, a data frame with the following column:
strata: strata/group names
median: median survival of each group
lower: 95% lower confidence limit
upper: 95% upper confidence limit
Returns a list of data frames when the input is a list of survfit objects. If combine = TRUE, results are combined into one single data frame.
library(survival)
# Different survfits
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::
fit.null <- surv_fit(Surv(time, status) ~ 1, data = colon)
fit1 <- surv_fit(Surv(time, status) ~ sex, data = colon)
fit2 <- surv_fit(Surv(time, status) ~ adhere, data = colon)
fit.list <- list(sex = fit1, adhere = fit2)
# Extract the median survival
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::
surv_median(fit.null)
surv_median(fit2)
surv_median(fit.list)
surv_median(fit.list, combine = TRUE)
# Grouped survfit
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::
fit.list2 <- surv_fit(Surv(time, status) ~ sex, data = colon,
group.by = "rx")
surv_median(fit.list2)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.