Multivariable logistic regression models for occurrence of HCoV LRTI among 297 patients with first HCoV infection (43 outcome events). (A) Models including ISI. ^aNearest value within 2 weeks before HCoV diagnosis. ^bLowest albumin level in the 2 weeks before HCoV diagnosis. ^cAt HCoV diagnosis. ^dA pathogen or antigen detected in a blood within 2 days of HCoV diagnosis. (B) Models including steroid use and monocyte count instead of ISI. ^aNearest value within 2 weeks before HCoV diagnosis. ^bLowest albumin level in the 2 weeks before HCoV diagnosis. ^cHighest daily steroid dose in the 2 weeks before HCoV diagnosis. ^dAt HCoV diagnosis. CI, confidence interval; OR, odds ratio.