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Prevalence of undiagnosed airflow obstruction among people with a history of smoking in a primary care setting.

Abstract：

PURPOSE:The purpose of this study was to define the prevalence of undiagnosed airflow obstruction (AO) among subjects with a history of smoking but no previous diagnosis of chronic lung disease. The finding of AO likely represents diagnosis of chronic obstructive pulmonary disease. PATIENTS:People aged ≥30 years with a history of smoking who attended public outpatient clinics for primary care services were included in this study. METHODS:A cross-sectional survey in five clinics in Hong Kong using the Breathlessness, Cough, and Sputum Scale, the Lung Function Questionnaire, and office spirometry was conducted. RESULTS:In total, 731 subjects (response rate =97.9%) completed the questionnaires and spirometry tests. Most of the subjects were men (92.5%) in the older age group (mean age =62.2 years; standard deviation =11.7). Of the 731 subjects, 107 had AO, giving a prevalence of 14.6% (95% confidence interval =12.1-17.2); 45 subjects with AO underwent a postbronchodilator test. By classifying the severity of chronic obstructive pulmonary disease using the Global Initiative for Chronic Obstructive Lung Disease, 27 (60%) were considered to be in mild category and 18 (40%) in moderate category. None of them belonged to the severe or very severe category. The total score of Lung Function Questionnaire showed that majority of the subjects with AO also had chronic cough, wheezing attack, or breathlessness, although most did not show any acute respiratory symptoms in accordance with the Breathlessness, Cough, and Sputum Scale. Diagnosis of AO was positively associated with the number of years of smoking (odds ratio =1.044, P=0.035) and being normal or underweight (odds ratio =1.605, P=0.046). It was negatively associated with a history of hypertension (odds ratio =0.491, P=0.003). CONCLUSION:One-seventh of smokers have undiagnosed AO. Spirometry screening of smokers should be considered in order to diagnose AO at an early stage, with an emphasis on smoking cessation.

journal_name

Int J Chron Obstruct Pulmon Dis

journal_title

International journal of chronic obstructive pulmonary disease

authors

Fu SN,Yu WC,Wong CK,Lam MC

doi

10.2147/COPD.S106306

subject

Has Abstract

pub_date

2016-09-27 00:00:00

pages

2391-2399

eissn

1176-9106

issn

1178-2005

pii

copd-11-2391

journal_volume

pub_type

杂志文章,多中心研究

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Prevalence of undiagnosed airflow obstruction among people with a history of smoking in a primary care setting.