S L Huang1, W H Pan. 1. Institute of Environmental Health Sciences, School of Medicine, National Yang-Ming University, Taipei, Taiwan. slhuang@ym.edu.tw
Abstract
BACKGROUND: The occurrence of asthma may be associated with dietary factors. OBJECTIVE: To examine the association between nutrient intake and physician-diagnosed asthma and allergic rhinitis. METHODS: A stratified, multiple-staged sampling design was used to select study areas, in which household interviews were carried out to gather information on health status and 24-h food recall. Data from 1166 adolescents, 13-17 years of age, were analysed. RESULTS: In univariate analysis, total calorie and energy-adjusted fat intake were associated with the prevalence of asthma, whereas vitamin A and vitamin C intake showed negative association with asthma. Multivariate logistic regression was used to adjust for sex and levels of urbanization; intake of saturated fats was associated with increased risk (OR = 2.02 for an increase of one SD, 95%CI 1.40-2.90), while monounsaturated fats were inversely related to asthma (OR = 0.65 for an increase of one SD, 95%CI 0.43-0.99). Vitamin C intake in the lowest quartile was associated with elevated risk for asthma with marginal significance (OR = 1.81, 95%CI 0.88-3.71, P = 0.10). None of the nutritional factors was associated with allergic rhinitis. CONCLUSION: Results from this cross-sectional survey suggest that saturated and monounsaturated fats may have different effects on airway inflammation.
BACKGROUND: The occurrence of asthma may be associated with dietary factors. OBJECTIVE: To examine the association between nutrient intake and physician-diagnosed asthma and allergic rhinitis. METHODS: A stratified, multiple-staged sampling design was used to select study areas, in which household interviews were carried out to gather information on health status and 24-h food recall. Data from 1166 adolescents, 13-17 years of age, were analysed. RESULTS: In univariate analysis, total calorie and energy-adjusted fat intake were associated with the prevalence of asthma, whereas vitamin A and vitamin C intake showed negative association with asthma. Multivariate logistic regression was used to adjust for sex and levels of urbanization; intake of saturated fats was associated with increased risk (OR = 2.02 for an increase of one SD, 95%CI 1.40-2.90), while monounsaturated fats were inversely related to asthma (OR = 0.65 for an increase of one SD, 95%CI 0.43-0.99). Vitamin C intake in the lowest quartile was associated with elevated risk for asthma with marginal significance (OR = 1.81, 95%CI 0.88-3.71, P = 0.10). None of the nutritional factors was associated with allergic rhinitis. CONCLUSION: Results from this cross-sectional survey suggest that saturated and monounsaturated fats may have different effects on airway inflammation.
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