E Huovinen1, J Kaprio, M Koskenvuo. 1. Department of Public Health, University of Helsinki, Finland. elisa.huovinen@helsinki.fi
Abstract
BACKGROUND: Asthma prevalence has been increasing especially in developed countries. The change seems to be associated with changes in lifestyle. We have made a prospective study to assess the effect of lifestyle factors, including smoking, educational level, physical activity and obesity on adult onset asthma. METHODS: A population of 10,597 adult twins, initially free of asthma was followed for 9 years. The main outcome measure was questionnaire-based report of physician diagnosed asthma. Logistic regression was used to estimate the risk of asthma predicted by lifestyle factors, with adjustment for atopy and respiratory symptoms. RESULTS: Obesity at baseline increased asthma risk (multivariable adjusted OR = 3.00, 95% CI: 1.64-5.50 for those with BMI > or = 30 compared to those with normal weight BMI: 20-24.99). Taller height was associated to lower asthma incidence. Leisure time physical activity had a slightly protective effect on asthma risk among men (P for trend = 0.037) while smoking and education did not have significant effects on the risk of adult onset asthma. CONCLUSIONS: Obesity was associated to the risk of adult onset asthma, while short height and low leisure time physical activity can be considered as other potential risk factors.
BACKGROUND:Asthma prevalence has been increasing especially in developed countries. The change seems to be associated with changes in lifestyle. We have made a prospective study to assess the effect of lifestyle factors, including smoking, educational level, physical activity and obesity on adult onset asthma. METHODS: A population of 10,597 adult twins, initially free of asthma was followed for 9 years. The main outcome measure was questionnaire-based report of physician diagnosed asthma. Logistic regression was used to estimate the risk of asthma predicted by lifestyle factors, with adjustment for atopy and respiratory symptoms. RESULTS:Obesity at baseline increased asthma risk (multivariable adjusted OR = 3.00, 95% CI: 1.64-5.50 for those with BMI > or = 30 compared to those with normal weight BMI: 20-24.99). Taller height was associated to lower asthma incidence. Leisure time physical activity had a slightly protective effect on asthma risk among men (P for trend = 0.037) while smoking and education did not have significant effects on the risk of adult onset asthma. CONCLUSIONS:Obesity was associated to the risk of adult onset asthma, while short height and low leisure time physical activity can be considered as other potential risk factors.
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