Data collection
Sociodemographic characteristics,
clinical symptoms, laboratory parameters, chest CT scanning features,
outcomes, and medications were extracted from the electronic medical
records. We followed laboratory-specific thresholds for all laboratory
parameters and categorized each into two or three strata. To quantify
the severity of pneumonia, we utilized two scores, i.e.,
confusion, uremia, respiratory
rate, blood pressure, and age ≥65 (CURB-65)9, and the quick
Sequential Organ Failure Assessment (qSOFA)10.