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Association of Mechanical Ventilation and Flue Use in Heaters With Asthma Symptoms in Japanese Schoolchildren : A Cross-Sectional Study in Sapporo, Japan

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Title: Association of Mechanical Ventilation and Flue Use in Heaters With Asthma Symptoms in Japanese Schoolchildren : A Cross-Sectional Study in Sapporo, Japan
Authors: Cong, Shi Browse this author
Araki, Atsuko Browse this author →KAKEN DB
Ukawa, Shigekazu Browse this author →KAKEN DB
Ait Bamai, Yu Browse this author
Tajima, Shuji Browse this author
Kanazawa, Ayako Browse this author →KAKEN DB
Yuasa, Motoyuki Browse this author →KAKEN DB
Tamakoshi, Akiko Browse this author →KAKEN DB
Kishi, Reiko Browse this author →KAKEN DB
Keywords: asthma
heating
mechanical ventilation
child
indoor air quality
Issue Date: 2014
Publisher: Japan Epidemiological Association
Journal Title: Journal of Epidemiology
Volume: 24
Issue: 3
Start Page: 230
End Page: 238
Publisher DOI: 10.2188/jea.JE20130135
Abstract: Background: Use of fuel heaters is associated with childhood asthma. However, no studies have evaluated the associations of flue use and mechanical ventilation (ventilation) with asthma symptoms in schoolchildren. Methods: This cross-sectional study investigated schoolchildren in grades 1 through 6 (age 6-12 years) in Sapporo, Japan. From November 2008 through January 2009, parents completed questionnaires regarding their home environment and their children's asthma symptoms. Results: In total, 4445 (69.5%) parents of 6393 children returned the questionnaire. After excluding incomplete responses, data on 3874 children (60.6%) were analyzed. The prevalence of current asthma symptoms and ever asthma symptoms were 12.8% and 30.9%, respectively. As compared with electric heaters, current asthma symptoms was associated with use of flued heaters without ventilation (OR = 1.62; 95% CI, 1.03-2.64) and unflued heaters with ventilation (OR = 1.77; 95% CI, 1.09-2.95) or without ventilation (OR = 2.23; 95% CI, 1.31-3.85). Regardless of dampness, unflued heaters were significantly associated with current asthma symptoms in the presence and absence of ventilation. Conclusions: Use of unflued heaters was associated with current asthma symptoms, regardless of dampness. In particular, the prevalence of current asthma symptoms was higher in the absence of ventilation than in the presence of ventilation. Ever asthma symptoms was only associated with use of unflued heaters without ventilation. Consequently, use of fuel heaters, especially those that have no flue or ventilation, deserves attention, as their use might be associated with childhood asthma symptoms.
Rights: https://creativecommons.org/licenses/by/3.0/
Type: article
URI: http://hdl.handle.net/2115/64062
Appears in Collections:環境健康科学研究教育センター (Center for Environmental and Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒木 敦子

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