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Prevalence of airflow limitation in outpatients with cardiovascular diseases in Japan.

Onishi, K; Yoshimoto, D; Hagan, GW; Jones, PW (2014) Prevalence of airflow limitation in outpatients with cardiovascular diseases in Japan. International Journal of Chronic Obstructive Pulmonary Disease, 9. 563 - 568. ISSN 1176-9106 https://doi.org/10.2147/COPD.S59962
SGUL Authors: Jones, Paul Wyatt

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Abstract

Background and objectives: Cardiovascular disease (CVD) and chronic obstructive pulmonary disease (COPD) commonly coexist and share common risk factors. The prevalence of COPD in outpatients with a smoking history and CVD in Japan is unknown. The aim of this study was to determine the proportion of Japanese patients with a smoking history being treated for CVD who have concurrent airflow limitation compatible with COPD. A secondary objective was to test whether the usage of lung function tests performed in the clinic influenced the diagnosis rate of COPD in the patients identified with airflow limitation. Methods: In a multicenter observational prospective study conducted at 17 centers across Japan, the prevalence of airflow limitation compatible with COPD (defined as forced expiratory volume (FEV)1/FEV6 <0.73, by handheld spirometry) was investigated in cardiac outpatients ≥40 years old with a smoking history who routinely visited the clinic for their CVD. Each patient completed the COPD Assessment Test prior to spirometry testing. Results: Data were available for 995 patients with a mean age of 66.6±10.0 years, of whom 95.5% were male. The prevalence of airflow limitation compatible with COPD was 27.0% (n=269), and 87.7% of those patients (n=236) did not have a prior diagnosis of COPD. The prevalence of previously diagnosed airflow limitation was higher in sites with higher usage of lung function testing (14.0%, 15.2% respectively) compared against sites where it is performed seldom (11.1%), but was still low. Conclusion: The prevalence of airflow limitation in this study indicates that a quarter of outpatients with CVD have COPD, almost all of whom are undiagnosed. This suggests that it is important to look routinely for COPD in CVD outpatients.

Item Type: Article
Additional Information: © 2014 Onishi et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License. The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. Permissions beyond the scope of the License are administered by Dove Medical Press Limited.
Keywords: COPD, CVD, diagnosis, handheld spirometer, lung function, Respiratory System
SGUL Research Institute / Research Centre: Academic Structure > Infection and Immunity Research Institute (INII)
Journal or Publication Title: International Journal of Chronic Obstructive Pulmonary Disease
ISSN: 1176-9106
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Dates:
DateEvent
29 May 2014Published
PubMed ID: 24920894
Web of Science ID: 24920894
Go to PubMed abstract
URI: https://openaccess.sgul.ac.uk/id/eprint/107178
Publisher's version: https://doi.org/10.2147/COPD.S59962

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