在既往吸烟者中,咳痰是发生COPD的独立危险因素
2010/04/14
摘要
背景和目的:目前,关于咳痰是否为发生COPD的危险因素尚需进一步研究证实。本试验旨在日本男性人群中研究上述相关性。
方法:783例肺活量正常的无呼吸道疾病的男性入选,分为3组:A组:非吸烟者;B组:有吸烟史,但无咳痰者;C组:有吸烟史,伴咳痰者。比较三组研究对象的COPD发病率,并评价发生COPD的相对风险。
结果:在平均33.6 ± 20.4个月的随访期内,19例(2.4%)研究对象出现COPD。C组COPD发病率显著高于B组(10.1 vs 2.2%, P = 0.003)。对所有对象、目前吸烟者和既往吸烟者进行多变量分析显示,咳痰是所有对象和既往吸烟者发生COPD的独立危险因素,但在当前吸烟者未见此相关性。
结论:在日本男性中,咳痰是发生COPD的独立风险因素。特别是在既往吸烟者中,患者常有咳痰的主述,应该视为发生COPD的高危患者。根据2001年慢性阻塞性肺疾病全球倡议指南,疾病0期患者是发生COPD的高危患者。
(刘国梁 审校)
Respirology. 2010 Jan 11. [Epub ahead of print]
Productive cough is an independent risk factor for the development of COPD in former smokers.
Yamane T, Hattori N, Kitahara Y, Haruta Y, Sasaki H, Yokoyama A, Kohno N.
Department of Hematology and Respiratory Internal Medicine, Kochi Medical School, Nangoku City, Kochi, Japan.
ABSTRACT Background and objective: It has yet to be determined whether the presence of productive cough is a risk factor for the development of COPD. The aim of the present study was to obtain more information on this potential association in Japanese men.
Methods: Seven hundred and eighty-three men with normal spirometry who did not have respiratory disease were recruited. The subjects were divided into three groups: group A, non-smokers; group B, those with a positive smoking history without productive cough; and group C, those with a positive smoking history and productive cough. The incidence rates of COPD were compared among the three groups and the relative risks for the development of COPD were assessed.
Results: During the mean follow-up period of 33.6 +/- 20.4 months, 19 (2.4%) subjects developed COPD. The incidence rate of COPD was significantly higher in group C than in group B (10.1 vs 2.2%, P = 0.003). A multivariate analysis of data for all subjects, current smokers and former smokers revealed that productive cough was an independent risk factor for the development of COPD in all subjects and former smokers but not in current smokers.
Conclusions: Productive cough was an independent risk factor for the development of COPD in Japanese men. In particular, former smokers who complain of this symptom should be regarded as being at high risk for the development of COPD. The data suggested that stage 0 disease, as defined in the Global Initiative for Chronic Obstructive Lung Disease 2001 guidelines, is relevant for the identification of subjects at risk of developing COPD.
Respirology. 2010 Jan 11. [Epub ahead of print]
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