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Markers of disease activity in COPD: an 8-year mortality study in the ECLIPSE cohort

Celli, B; Locantore, N; Yates, JC; Bakke, P; Calverley, PMA; Crim, C; Coxson, HO; ... Evaluation of COPD Longitudinally to Identify Predictive Surroga; + view all (2021) Markers of disease activity in COPD: an 8-year mortality study in the ECLIPSE cohort. European Respiratory Journal , 57 (3) , Article 2001339. 10.1183/13993003.01339-2020. Green open access

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RATIONALE: There are no validated measures of disease activity in chronic obstructive pulmonary disease (COPD). Since "active" disease is expected to have worse outcomes (e.g. mortality), we explored potential markers of disease activity in patients enrolled in the ECLIPSE cohort in relation to 8-year all-cause mortality. METHODS: We investigated: (1) how changes in relevant clinical variables over time (1 or 3 years) relate to 8-year mortality; (2) whether these variables inter-relate; and (3) if any clinical, imaging, and/or biological marker measured cross-sectionally at baseline relates to any activity component. RESULTS: Results showed that: (1) After 1 year, hospitalisation for COPD, exacerbation frequency, worsening of body mass index, airflow obstruction, dyspnoea, and exercise (BODE) index or health status (St. George's Respiratory Questionnaire [SGRQ]), and persistence of systemic inflammation were significantly associated with 8-year mortality; (2) At 3 years, the same markers, plus forced expiratory volume in 1 s (FEV1) decline and to a lesser degree computed tomography (CT) emphysema, showed association, thus qualifying as markers of disease activity; (3) Changes in FEV1, inflammatory cytokines and CT emphysema were not inter-related, while the multidimensional indices (BODE and SGRQ) showed modest correlations; and, (4) Changes in these markers could not be predicted by any baseline cross-sectional measure. CONCLUSIONS: In COPD, 1- and 3-year changes in exacerbation frequency, systemic inflammation, BODE and SGRQ scores, and FEV1 decline are independent markers of disease activity associated with 8-year all-cause mortality. These disease activity markers are generally independent and not predictable from baseline measurements.

Type: Article
Title: Markers of disease activity in COPD: an 8-year mortality study in the ECLIPSE cohort
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1183/13993003.01339-2020
Publisher version: https://doi.org/10.1183/13993003.01339-2020
Language: English
Additional information: Copyright © ERS 2021. This version is distributed under the terms of the Creative Commons Attribution Non-Commercial Licence 4.0.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > VP: Health
URI: https://discovery.ucl.ac.uk/id/eprint/10117545
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