Figure 3 Kaplan-Meier survival curves of patients with different insurance types from the original data (A) and matched data (B). The curves describe the survival probability of each cohort at each day after admission to the ICU to the endpoint (censor or death). Median survival times for the two cohorts from the original data were 277 and 1 005 days, respectively; from the matched data, they were 534 and 924 days, respectively (the horizontal position of the dashed lines). The numbers below the plots refer to the patients at risk of death for every 1 000 days.