Interpretation rpart.plot of survival model

[jkang]

Hello

I made a decision tree survival prediction model.

The nodes of rpart.plot shows three rows.
How do I interpret the number of the first row?

I guess it is a relative risk or odds ratio.

Please let me know its meaning.

library(prodlim)
library(rpart)
library(survival)
set.seed(50)
d <- SimSurv(50)

decision_spec <- decision_tree() %>%
  set_engine("rpart") %>%
  set_mode("censored regression") %>%
  update(cost_complexity = 0.001,
         tree_depth = 3,
         min_n = 5)


f_fit <- fit(decision_spec,
             Surv(time,status)~X1+X2,data=d)


f_fit$fit$rpart %>%
  rpart.plot::rpart.plot(main = "Survival Prediction")