Effects of dementia on the risks of acute organ dysfunction, severe sepsis and hospital mortality in hospitalized older patients.

aValues are expressed as number (percentage).bCovariates in model 1 included baseline covariates (i.e., age, sex, surgical condition, comorbidities, principal diagnoses, infection status, hospital level, and length of hospital stay); covariates in model 2 included baseline covariates and life-support measures (i.e., hemodialysis, vasopressors, mechanical ventilation and intensive care).cInfection status was not included as a covariate because it is a component of severe sepsis.