Association of overweight with asthma symptoms in Japanese school children
Article first published online: 4 JUL 2010
© 2011 The Authors.Pediatrics International © 2011 Japan Pediatric Society
Volume 53, Issue 2, pages 192–198, April 2011
How to Cite
Okabe, Y., Itazawa, T., Adachi, Y., Yoshida, K., Ohya, Y., Odajima, H., Akasawa, A. and Miyawaki, T. (2011), Association of overweight with asthma symptoms in Japanese school children. Pediatrics International, 53: 192–198. doi: 10.1111/j.1442-200X.2010.03197.x
- Issue published online: 19 APR 2011
- Article first published online: 4 JUL 2010
- Accepted manuscript online: 4 JUL 2010 12:00AM EST
- Received 17 February 2010; revised 10 May 2010; accepted 10 June 2010.
- school children
Background: Most studies regarding the association of obesity with asthma have been performed in the Western countries. This study is a nationwide survey conducted in Japan.
Methods: A cross-sectional and questionnaire-based survey was performed among children aged 6–7, 13–14, and 16–17 years, using the ISAAC questionnaire. Overweight was defined as BMI ≥ 90th according to the reference values for Japanese children obtained during 1978–1981.
Results: Of a total of 179 218 children, 149 464 replied to the questionnaire (response rate 83.4%). After omitting incomplete data, 139 117 were analyzed. In all the age groups, being overweight was associated with current asthma after adjustment for confounding factors (adjusted OR: 1.24 in children 6–7 years of age, 1.31 in those 13–14 years, and 1.32 in those 16–17 years). These tendencies were observed in both genders. Overweight was a risk factor for nocturnal cough, independent of current asthma in the older age groups (adjusted OR: 1.21 in children 13–14 years, and 1.17 in those 16–17 years).
Conclusions: There is a clear association between obesity and current asthma in Japanese school-aged children. Mechanisms through which obesity related with nocturnal cough might be different from those of obesity-associated asthma.