Longitudinal Lung Function Growth of Mexican Children Compared with International Studies

Autores: David Martínez-Briseño1, Rosario Fernández-Plata1, Laura Gochicoa-Rangel1, Luis Torre-Bouscoulet1, Rosalba Rojas-Martínez2, Laura Mendoza2, Cecilia García-Sancho1, Rogelio Pérez-Padilla1*
Publicado en: Plos-One

Introduction: Our aim was to compare the longitudinal lung function growth of Mexican children and adolescents with the collated spirometric reference proposed for international use and with that of Mexican-Americans from the National Health State Examination Survey III (NHANES) III study.

Materials and Methods: A cohort of Mexican children in third year of primary school el-proceso-de-crecimiento-infantilwas followed with spirometry twice a year through secondary school. Multilevel mixed-effects lineal models separated by gender were fit for the spirometric variables of 2,641 respiratory-healthy Mexican children expressed as Z-scores of tested reference equations. Impact of adjustment by sitting height on differences with Mexican-American children was observed in a subsample of 1,987 children.

Results: At same gender, age, and height, Mexican children had increasingly higher forced expiratory volume in 1 s (FEV1) and Forced vital capacity (FVC) than the children from the collated reference study (mean Z-score, 0.68 for FEV1 and 0.51 for FVC) and than Mexican-American children (Z-score, 0.23 for FEV1 and 0.21 for FVC) respectively. Differences with Mexican-Americans were not reduced by adjusting by sitting height.

Conclusions: For reasons that remain unclear, the gender-, age-, and height-adjusted lung function of children from Mexico City is higher than that reported by several international studies.

 Martínez-Briseño D, Fernández-Plata R, Gochicoa-Rangel L, Torre-Bouscoulet L, Rojas-Martínez R, et al. (2013) Longitudinal Lung Function, Growth of Mexican Children Compared with International Studies . PLoS ONE 8(10): e77403. doi:10.1371/journal.pone.0077403
1 National Institute of Respiratory Diseases (INER), Mexico City, Mexico, 2 National Institute of Public Health (INSP), Mexico City, Mexico

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Centro de Investigación en Evaluación y Encuestas del Instituto Nacional de Salud Pública de México.
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