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Binary logistic regression analysis was performed, and data are reported as odds ratio and 95% CI. CURB-65, blood urea nitrogen level >19 mg/dl (>7 mmol/l), respiratory rate ≥30, blood pressure (systolic <90 mm Hg or diastolic ≤60 mm Hg) and age ≥65 years.
CURB-65: Confusion status; ICU: Intensive care unit; qSOFA: Quick Sequential Organ Failure Assessment.
