Clinical implications of frailty assessed in hospitalized patients with acute-exacerbation of interstitial lung disease.

Background: Approximately 50% of patients with interstitial lung disease (ILD) experience frailty, which remains unexplored in acute exacerbations of ILD (AE-ILD). A better understanding may help with prognostication and resource planning. We evaluated the association of frailty with clinical characteristics, physical function, hospital outcomes, and post-AE-ILD recovery.
Methods: Retrospective cohort study of AE-ILD patients (01/2015-10/2019) with frailty (proportion ≥0.25) on a 30-item cumulative-deficits index. Frail and non-frail patients were compared for pre- and post-hospitalization clinical characteristics, adjusted for age, sex, and ILD diagnosis. One-year mortality, considering transplantation as a competing risk, was analysed adjusting for age, frailty, and Charlson Comorbidity Index (CCI).
Results: 89 AE-ILD patients were admitted (median: 67 years, 63% idiopathic pulmonary fibrosis). 31 were frail, which was associated with older age, greater CCI, lower 6-min walk distance, and decreased independence pre-hospitalization. Frail patients had more major complications (32% vs 10%, p = .01) and required more multidisciplinary support during hospitalization. Frailty was not associated with 1-year mortality (HR: 0.97, 95%CI: [0.45-2.10]) factoring transplantation as a competing risk.
Conclusions: Frailty was associated with reduced exercise capacity, increased comorbidities and hospital complications. Identifying frailty may highlight those requiring additional multidisciplinary support, but further study is needed to explore whether frailty is modifiable with AE-ILD.
Competing Interests: Declaration of conflicting interestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: Lee Fidler has received a grant from the Canadian Pulmonary Fibrosis Foundation and honoraria for speaking/lecturing from Boehringer Ingelheim, AstraZeneca, and Pfizer. Jolene Fisher acknowledges grants from Boehringer Ingelheim (for the Canadian Registry for Pulmonary Fibrosis) and payments made to the University of British Columbia, with subsequent support for the University of Toronto. She has received consulting fees and honoraria from AstraZeneca and Boehringer Ingelheim, as well as honoraria from Boehringer Ingelheim for a presentation. She serves as an unpaid Medical Advisory Board Member for the Canadian Pulmonary Fibrosis Foundation. W. Darlene Reid and Dmitry Rozenberg received a grant from the Canadian Institutes of Health Research for their project “Translating the interplay of cognition and physical performance to daily activities in COPD and ILD: Identifying Needs and Advancing Research Priorities. “Shane Shapera acknowledges a grant from Boehringer Ingelheim Canada and honoraria for speaking at CME events from AstraZeneca, Boehringer Ingelheim, and Hoffman La-Roche. All other authors have no conflicts of interest to declare.