University of Oulu

Lotta Peltola, Heikki Pätsi & Terttu Harju (2020) COPD Comorbidities Predict High Mortality – Asthma-COPD-Overlap Has Better Prognosis, COPD: Journal of Chronic Obstructive Pulmonary Disease, 17:4, 366-372, DOI: 10.1080/15412555.2020.1783647

COPD comorbidities predict high mortality : asthma-COPD-overlap has better prognosis

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Author: Peltola, Lotta1; Pätsi, Heikki1; Harju, Terttu1
Organizations: 1Oulu University Hospital, Department of Medicine, Respiratory Unit and MRC Oulu, Respiratory Research Group, University of Oulu and Oulu University Hospital
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
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Language: English
Published: Informa, 2020
Publish Date: 2021-06-30


The purpose of this study was to investigate the characteristics and survival of patients with COPD and asthma-COPD overlap (ACO) and how these patient groups differ from each other. We examined the impact of different comorbidities, multimorbidity, lung function and other factors have on survival in COPD and ACO patients. We also examined the causes of death to determine how many patients die of other than respiratory diseases. This retrospective study includes 214 patients with an exacerbation of COPD requiring hospitalisation during the year of 2005. The patients were followed up until the end of year 2015. The survival of ACO patients was significantly higher than COPD patients (4.7 vs. 1.7 years, p = 0.001). Poor lung function predicted worse survival in both patient groups, but the prognosis was still better in ACO patients with both FEV1 over and under 50% of predicted (median survival 8.4 years vs. 5.8 years, p < 0.001) compared to COPD (4.9 and 3.1 years, respectively). In this study setting, the negative effect of having three or more comorbidities on survival was significant in both groups. We didn’t see major differences in the profiles of comorbidity patterns, in the underlying cause of deaths or in the pulmonary functions between ACO and COPD groups at the beginning of follow-up. Patients with a BMI over 25 seemed to have a trend for better survival (p = 0.055), but no differences were found between ACO and COPD groups.

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Series: COPD. Journal of chronic obstructive pulmonary disease
ISSN: 1541-2555
ISSN-E: 1541-2563
ISSN-L: 1541-2555
Volume: 17
Issue: 4
Pages: 366 - 372
DOI: 10.1080/15412555.2020.1783647
Type of Publication: A1 Journal article – refereed
Field of Science: 3121 General medicine, internal medicine and other clinical medicine
Copyright information: © 2020 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Chronic Obstructive Pulmonary Disease on 30 Jun 2020, available online: