Am J Epidemiol 2003; 158:576-584.
Copyright © 2003 by Johns
Hopkins Bloomberg School of Public Health
ORIGINAL CONTRIBUTIONS |
Childrens Lung Function and Antioxidant Vitamin, Fruit, Juice, and Vegetable Intake
From the Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.
The authors investigated the relation between childrens pulmonary function and intake of fruits, vegetables, juices, and vitamins A, C, and E by examining cross-sectional data from 2,566 children in the Childrens Health Study collected during 19971998. Low total vitamin C intake (
10th percentile) was associated with deficits in forced vital capacity for both boys and girls and with deficits in flows that were larger in girls (forced expiratory volume in 1 second (FEV1), 3.3%, 95% confidence interval (CI): 6.0, 0.5; forced expiratory flow between 25% and 75% of forced vital capacity (FEF2575), 5.5%, 95% CI: 10.5, 0.3) compared with boys (FEV1, 2.3%, 95% CI: 4.8, 0.3; FEF2575, 2.4%, 95% CI: 7.4, 2.8). Low dietary vitamin E intake was associated with lower FEF2575 (boys: FEF2575 , 8.9%, 95% CI: 14.2, 3.3; girls: FEF2575 , 2.5%, 95% CI: 8.3, 3.7). Deficits in FEF2575 were associated with low dietary vitamin A intake in girls (FEF2575, 7.9%, 95% CI: 12.7, 2.8) and with low total vitamin A intake in boys with asthma (FEF2575, 15.6%, 95% CI: 27.6, 1.6). Low intakes of orange and other fruit juices, which were the largest source of vitamin C, were associated with deficits in forced vital capacity and FEV1 in boys. In summary, lung function levels were lower in children with inadequate dietary antioxidant vitamin intake.
antioxidants; ascorbic acid; child; diet; respiratory function tests; vitamin A; vitamin E
Abbreviations: Abbreviations: CI, confidence interval; FEF2575, forced expiratory flow between 25 and 75 percent of forced vital capacity; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity.
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