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Subgroup analysis for in-hospital mortality. Subgroup analysis demonstrated a significant survival benefit among elderly patients older than 65 years (adjusted OR, 0.16; 95% CI, 0.06–0.44), IL-6 > 10 times upper limit level (adjusted OR, 0.06; 95% CI, 0.22–0.30), and D-dimer > 5 times upper limit level (adjusted OR, 0.06; 95% CI, 0.014–0.27)
