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Am J Respir Crit Care Med. 2001 Nov 15;164(10 Pt 1):1835-40.

Body mass index and asthma in adults in families of subjects with asthma in Anqing, China.

Author information

1
Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA. juan.celedon@channing.harvard.edu

Abstract

We conducted a cross-sectional study of 7,109 adults from families of subjects with asthma in the province of Anhui, China. Asthma was defined either as a combination of physician-diagnosed asthma, airway responsiveness to methacholine at < or = 25 mg/ml and two or more respiratory symptoms or asthma attacks ("asthma"); or as a combination of airway responsiveness to methacholine at < or = 8 mg/ml and two or more respiratory symptoms or asthma attacks ("symptomatic airway hyperresponsiveness [AHR]"). After adjusting for intensity of cigarette smoking and other variables, both extremes of the body mass index (BMI) distribution were associated with symptomatic AHR in men and women (p < 0.01). In the multivariate analysis, both under- and overweight were associated with asthma in women, and underweight was associated with asthma in men. Among men, those with BMIs of 16 and 30 kg/m(2) had 2.5 and 2.3 times higher odds of symptomatic AHR, respectively, than those whose BMI was 21 kg/m(2) (95% CI for OR(16 vs. 21 kg/m)(2) = 1.4 to 3.8; 95% CI for OR(30) (vs.) (21) (kg/m)(2) = 1.2 to 5.0). Among women, those with BMIs of 16 and 30 kg/m(2) had 2.0 and 2.3 times higher odds of symptomatic AHR than those whose BMI was 21 kg/m(2) (95% CI for OR(16) (vs.) (21) (kg/m)(2) = 1.3 to 3.1; 95% CI(30) (vs.) (21) (kg/m)(2) = 1.2 to 4.5). Among adults in families of subjects with asthma living in rural China, both underweight and overweight are associated with an increased risk of asthma.

PMID:
11734432
DOI:
10.1164/ajrccm.164.10.2105033
[Indexed for MEDLINE]
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