The Association of a Frailty Index and Incident Delirium in Older Hospitalized Patients: An Observational Cohort Study.

Introduction/background: Frailty identifies patients that have vulnerability to stress. Acute illness and hospitalization are stressors that may result in delirium and further accelerate the negative consequences of frailty.

Purpose: The purpose of this study was to determine whether frailty, identified at hospital admission and as measured by a frailty index, is associated with incident delirium.