ALB and nosocomial infection: TP: Total protein; ALB: Albumin; WBC: White blood cell count; NEU%: Neutrophils percentage; CCI: Charlson comorbidity index; SOFA: Sequential organ failure assessment.*: Death or life-sustaining therapy withheld due to poor prognosis; #: patient with community-acquired infection or healthcare-associated infection was admitted or transferred to the ICU.