Fig. 4

Kaplan-Meier analysis according to the initiation and duration of steroid use. At the end of the 16-year cohort, the percentage of patients free of a second HSP was 94.7%, 88.1%, 84.0%, 55.3%, and 25.0% for patients with steroid initiation < 14 days and duration < 10 days, no steroid use, initiation ≥14 days and duration < 10 days, initiation ≥14 days and duration ≥10 days, initiation < 14 days and duration ;≥10 days, respectively