(A) Kaplan–Meier analysis of 30-day survival after admission between patients with severe fever with thrombocytopenia syndrome (SFTS) with and without steroid therapy before and after propensity score matchinga. (B) Kaplan–Meier analysis of 30-day survival after admission among patients with severe fever with thrombocytopenia syndrome (SFTS) with early, late, and non-steroid treatment, before propensity score matching. (C) Kaplan–Meier analysis of 30-day survival after admission among patients with severe fever with thrombocytopenia syndrome (SFTS) with early, late, and non-steroid treatment, after propensity score matching. a. There were 7 missing patients in the unmatched dataset and 4 in the matched dataset due to missing data on 30-day survival time.