Development of a frailty index for patients with coronary artery disease.

Objectives: To construct a brief frailty index for older patients with coronary artery disease (CAD) undergoing coronary angiography that includes physical, cognitive, and psychosocial criteria and accurately predicts future disability and decline in health-related quality of life (HRQL).

Design: Prospective cohort.

Setting: An urban tertiary care hospital in Alberta, Canada.