Prevalence of physician-diagnosed COPD and its association with smoking among urban and rural residents in regional mainland China.

Abstract:

OBJECTIVES:To investigate the prevalence of physician-diagnosed COPD and to explore the relationship between the total amount of cigarettes smoked (TACS) and COPD among urban and rural adults in Nanjing, China. DESIGN:Population-based, cross-sectional study conducted between October 2000 and March 2001. SETTING:Administrative villages (n = 45) randomly selected from three urban districts and two rural counties of Nanjing municipality, Jiangsu province, China, with an overall population of 5.6 million. PARTICIPANTS:All regular local residents >/= 35 years old (n = 29,319), 67.7% from urban areas and 32.3% from rural areas; 49.7% were men and 50.3% were women. RESULTS:The response rate of potential participants was 90.1%. The overall prevalence of diagnosed COPD was 5.9%. The prevalence of COPD was significantly higher among men than in women (7.2% vs 4.7%, p = 0.000), while the difference between urban and rural participants was not statistically significant (6.7% vs 4.4%, respectively; p = 0.132). The prevalence of COPD was significantly higher among smokers than nonsmokers. After adjusting for age, gender, area of residence, fuels, heating in winter, ventilation in kitchen, passive smoking, education, occupation, average family income, alcohol drinking, cooking oil, body mass index, and physical activity, a dose-response relationship between COPD and TACS was evident in this population (odds ratio [OR], 1.60; 95% confidence interval [CI], 1.34 to 1. 92; OR, 1.39; 95% CI, 1.13 to 1.70; and OR, 1.24; 95% CI, 1.01 to 1.52 for smokers within upper, middle, and lower TACS levels compared with nonsmokers, respectively). CONCLUSIONS:The overall prevalence of diagnosed COPD (5.9%) among Chinese adults was higher than that (2.5%) estimated by World Health Organization experts, and there was a significant gradient increase in COPD prevalence from the stratum of nonsmokers to the stratum of upper TACS.

journal_name

Chest

journal_title

Chest

authors

Xu F,Yin X,Zhang M,Shen H,Lu L,Xu Y

doi

10.1378/chest.128.4.2818

subject

Has Abstract

pub_date

2005-10-01 00:00:00

pages

2818-23

issue

4

eissn

0012-3692

issn

1931-3543

pii

S0012-3692(15)52708-6

journal_volume

128

pub_type

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