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Association of overweight with asthma symptoms in Japanese school children
Author(s) -
Okabe Yoshie,
Itazawa Toshiko,
Adachi Yuichi,
Yoshida Koichi,
Ohya Yukihiro,
Odajima Hiroshi,
Akasawa Akira,
Miyawaki Toshio
Publication year - 2011
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.2010.03197.x
Subject(s) - medicine , overweight , asthma , obesity , confounding , pediatrics , cross sectional study , demography , risk factor , pathology , sociology
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.

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