Validation of a Frailty Index from The Older Persons and Informal Caregivers Survey Minimum Data Set

To the Editor: Frailty refers to a state of vulnerability to adverse health outcomes.1 Although clinically assessing a breadth of health complexities is a robust method of measuring frailty,1 such a detailed assessment is timely and cost prohibitive in large studies. For this reason, a growing body of literature has begun to apply a frailty index (FI) based on the concept of deficit accumulation.2-5 Deficits in health may include a range of...