Frailty, Chronological Age, and Clinical Outcomes in COPD: A Nationwide Cohort Study.
BACKGROUND AND OBJECTIVES Frailty and chronological age are major prognostic factors in chronic obstructive pulmonary disease (COPD), yet their combined effects have not been fully examined in large population-based cohorts. We investigated whether low frailty attenuates the adverse impact of aging on COPD outcomes....