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J Asthma. 2013 May;50(4):395-402. doi: 10.3109/02770903.2013.770014. Epub 2013 Feb 25.

Association of general and central obesity and atopic and nonatopic asthma in US adults.

Author information

  • 1Department of Health Services Research, Palo Alto Medical Foundation Research Institute, Palo Alto, CA, USA. maj@pamfri.org

Abstract

OBJECTIVE:

To examine the association of body mass index (BMI), waist circumference (WC), and waist-to-height ratio (WHtR) with the prevalence of asthma by atopic status and sex using nationally representative data in the US.

METHODS:

The National Health and Nutrition Examination Survey 2005-2006 data were analyzed using areas under the receiver operating characteristic (ROC) curves (AUCs) and multivariate logistic regression models.

RESULTS:

Women had higher AUCs (0.59-0.64) than men (0.50-0.58) across anthropometric indices and asthma outcomes. After controlling for sociodemographic characteristics and smoking status, only WHtR was positively associated with atopic asthma in both sexes (odds ratio per 1 SD [95% confidence interval]: men, 1.018 [1.004, 1.032], p = .01; women, 1.018 [1.006, 1.030], p = .003), and the associations persisted after further adjustment of BMI. Only in women was nonatopic asthma significantly associated with every 1 SD increase of BMI (odds ratio [95% confidence interval]: 1.018 [1.006, 1.030], p = .003), WC (1.018 [1.006, 1.030], p = .004), and WHtR (1.016 [1.004, 1.028], p = .008).

CONCLUSIONS:

Using US national data, this study adds to the emerging evidence suggesting two possible distinct phenotypes: (1) obese men and women with atopic asthma and (2) obese women with nonatopic asthma. The mechanistic and therapeutic implications of these findings warrant further investigation.

PMID:
23351029
[PubMed - indexed for MEDLINE]
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