Fig. 1

Kaplan–Meier survival curves for crude cumulative non-adverse clinic event survival in the short-time and long-time discharge groups before matching. Survival curves were compared using log-rank test, there was no significant difference between short-time discharge group and long-time discharge group (P = 0.69).Short-time discharge: short-time discharge group (n = 432), Long-time discharge: long time discharge group (n = 992)