RT Journal Article
SR Electronic
T1 Elemental carbon exposure and lung function in schoolchildren from Mexico City
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP erj01114-2010
DO 10.1183/09031936.00111410
A1 A. Barraza-Villarreal
A1 M.C. Escamilla-Nuñez
A1 L. Hernández-Cadena
A1 J.L. Texcalac-Sangrador
A1 J.J. Sienra-Monge
A1 B.E. del Río-Navarro
A1 M.M. Cortez-Lugo
A1 P.D. Sly
A1 I. Romieu
YR 2011
UL http://erj.ersjournals.com/content/early/2011/02/10/09031936.00111410.abstract
AB Though exposure to air pollution has a detrimental effect on respiratory health, few studies have examined the association between elemental carbon exposure and lung function among schoolchildren.To determine the association between short-term elemental carbon exposure and lung function in schoolchildren from Mexico City.Fifty-five asthmatic and 40 non-asthmatic children were followed for an average of 22 weeks. A spirometry test was performed every 15 days during follow-up. Portable air samplers collected particulate matter onto Teflon filters. Gravimetric analysis was conducted and elemental carbon was quantified using transmission densitometry. The association between the main variables was analysed using linear mixed effects models.The mean of elemental carbon light absorption was 94.7 Mn−1 (standard deviation 55.7). An increase of one interquartile range in the 24-hour average of elemental carbon (100.9 Mn−1) was associated with a significant negative impact on FEV1 [−62.0 mL (95%CI −123.3 mL, −1.2 mL] and FEV25–75 [−111 mL (95%CI −228.3, −4.1 mL)] among asthmatic children—equal to 3.3% and 5.5%, respectively; and on FEV1 [−95.0 mL (95%CI −182.3 mL, −8.5 mL)] and FVC [−105.0 mL (95%CI–197.0 mL, −13.7 mL)] among non-asthmatic children.Exposure to elemental carbon resulted in an important negative effect on lung function in atopic schoolchildren, regardless of asthma status.