Etiology of ethnic differences in childhood spirometry

Strippoli, M P, Kuehni, Claudia E., Dogaru, Cristian, Spycher, B D, McNally, T, Silverman, M and Beardsmore, Caroline S (2013) Etiology of ethnic differences in childhood spirometry. Pediatrics, 131 (6). e1842-9. ISSN 0031-4005

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Abstract

OBJECTIVES: Age- and height-adjusted spirometric lung function of South Asian children is lower than those of white children. It is unclear whether this is purely genetic, or partly explained by the environment. In this study, we assessed whether cultural factors, socioeconomic status, intrauterine growth, environmental exposures, or a family and personal history of wheeze contribute to explaining the ethnic differences in spirometric lung function. METHODS: We studied children aged 9 to 14 years from a population-based cohort, including 1088 white children and 275 UK-born South Asians. Log-transformed spirometric data were analyzed using multiple linear regressions, adjusting for anthropometric factors. Five different additional models adjusted for (1) cultural factors, (2) indicators of socioeconomic status, (3) perinatal data reflecting intrauterine growth, (4) environmental exposures, and (5) personal and family history of wheeze. RESULTS: Height- and gender-adjusted forced vital capacity (FVC) and forced expired volume in 1 second (FEV1) were lower in South Asian than white children (relative difference -11% and -9% respectively, P \textless .001), but PEF and FEF50 were similar (P \textgreater/= .5). FEV1/FVC was higher in South Asians (1.8%, P \textless .001). These differences remained largely unchanged in all 5 alternative models. CONCLUSIONS: Our study confirmed important differences in lung volumes between South Asian and white children. These were not attenuated after adjustment for cultural and socioeconomic factors and intrauterine growth, neither were they explained by differences in environmental exposures nor a personal or family history of wheeze. This suggests that differences in lung function may be mainly genetic in origin. The implication is that ethnicity-specific predicted values remain important specifically for South Asian children.

Item Type: Article
Uncontrolled Keywords: adolescent, anthropometry, Asian continental ancestry group, body height, child, ethnic groups/statistics & numerical data, female, forced expiratory volume, Great Britain, Humans, linear models, lung/physiopathology, male, questionnaires, socioeconomic factors, spirometry/statistics & numerical data
Subjects: R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Divisions: Faculty of Arts, Business & Applied Social Science > Department of Applied Social Sciences
Depositing User: Cristian Dogaru
Date Deposited: 26 Jul 2019 07:44
Last Modified: 26 Jul 2019 07:44
URI: http://oars.uos.ac.uk/id/eprint/336

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