Figure 2

Kaplan-Meier survival curves of patients with acute respiratory distress syndrome in different age groups. (A) The patients <65 years old had a significantly higher survival rate than those ≥65 years old (p = 0.0049). (B) The survival rate was not significantly different among those aged 65–74 years, 75–84 years old and ≥85 years old groups (p = 0.774).