RT Journal Article
SR Electronic
T1 Dietary intake of vitamin A, lung function, and incident asthma in childhood
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP 2004407
DO 10.1183/13993003.04407-2020
A1 Mohammad Talaei
A1 David A. Hughes
A1 Osama Mahmoud
A1 Pauline M. Emmett
A1 Raquel Granell
A1 Stefano Guerra
A1 Seif O. Shaheen
YR 2021
UL http://erj.ersjournals.com/content/early/2021/03/18/13993003.04407-2020.abstract
AB Longitudinal epidemiological data are scarce on the relation between dietary intake of vitamin A and respiratory outcomes in childhood. We investigated whether a higher intake of preformed vitamin A or provitamin β-carotene in mid-childhood is associated with higher lung function and with asthma risk in adolescence.In the Avon Longitudinal Study of Parents and Children, dietary intakes of preformed vitamin A and β-carotene equivalents were estimated by food frequency questionnaire at 7 years of age. Post- bronchodilator forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and forced expiratory flow at 25–75% of FVC (FEF25–75) were measured at 15.5 years and transformed to z scores. Incident asthma was defined by new cases of doctor-diagnosed asthma at age 11 or 14 years.In multivariable adjusted models, a higher intake of preformed vitamin A was associated with higher lung function and a lower risk of incident asthma: comparing top versus bottom quartiles of intake, regression coefficients (95% confidence intervals) for FEV1 and FEF25–75 were, respectively, 0.21 (0.05–0.38; P-trend 0.008) and 0.18 (0.03–0.32; P-trend 0.02); odds ratios (95% confidence intervals) for FEV1/FVC ratio below the lower limit of normal and incident asthma were, respectively, 0.49 (0.27–0.90, P-trend 0.04) and 0.68 (0.47, 0.99; P-trend 0.07). In contrast, there was no evidence for association with β-carotene. We also found some evidence for modification of the associations between preformed vitamin A intake and lung function by BCMO1, NCOR2 and CC16 gene polymorphisms.A higher intake of preformed vitamin A, but not β-carotene, in mid-childhood is associated with higher subsequent lung function and lower risk of fixed airflow limitation and incident asthma.FootnotesThis manuscript has recently been accepted for publication in the European Respiratory Journal. It is published here in its accepted form prior to copyediting and typesetting by our production team. After these production processes are complete and the authors have approved the resulting proofs, the article will move to the latest issue of the ERJ online. Please open or download the PDF to view this article.Conflict of interest: Dr. Talaei has nothing to disclose.Conflict of interest: Dr. Hughes has nothing to disclose.Conflict of interest: Dr. Mahmoud has nothing to disclose.Conflict of interest: Dr. Emmett reports grants from Nestle Nutriton, personal fees from European Food Safety Authority, outside the submitted work; .Conflict of interest: Dr. Granell has nothing to disclose.Conflict of interest: Dr. Guerra has nothing to disclose.Conflict of interest: Dr. Shaheen has nothing to disclose.