Secondhand smoke exposure and asthma outcomes among African-American and Latino children with asthma

Andreas M. Neophytou*, Sam S. Oh, Marquitta J. White, Angel C.Y. Mak, Donglei Hu, Scott Huntsman, Celeste Eng, Denise Serebrisky, Luisa N. Borrell, Harold J. Farber, Kelley Meade, Adam Davis, Pedro C. Avila, Shannon M. Thyne, William Rodríguez-Cintrón, José R. Rodríguez-Santana, Rajesh Kumar, Emerita Brigino-Buenaventura, Saunak Sen, Michael A. LenoirL. Keoki Williams, Neal L. Benowitz, John R. Balmes, Ellen A. Eisen, Esteban G. Burchard

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Background: Secondhand smoke (SHS) exposures have been linked to asthma-related outcomes but quantitative dose-responses using biomarkers of exposure have not been widely reported. Objectives: Assess dose-response relationships between plasma cotinine-determined SHS exposure and asthma outcomes in minority children, a vulnerable population exposed to higher levels of SHS and under-represented in the literature. Methods: We performed analyses in 1172 Latino and African-American children with asthma from the mainland USA and Puerto Rico. We used logistic regression to assess relationships of cotinine levels ≥0.05 ng/mL with asthma exacerbations (defined as asthma-related hospitalisations, emergency room visits or oral steroid prescription) in the previous year and asthma control. The shape of dose-response relationships was assessed using a continuous exposure variable in generalised additive logistic models with penalised splines. Results: The OR for experiencing asthma exacerbations in the previous year for cotinine levels ≥0.05 ng/mL, compared with <0.05 ng/mL, was 1.40 (95% CI 1.03 to 1.89), while the OR for poor asthma control was 1.53 (95% CI 1.12 to 2.13). Analyses for dose-response relationships indicated increasing odds of asthma outcomes related with increasing exposure, even at cotinine levels associated with light SHS exposures. Conclusions: Exposure to SHS was associated with higher odds of asthma exacerbations and having poorly controlled asthma with an increasing dose-response even at low levels of exposure. Our results support the conclusion that there are no safe levels of SHS exposures.

Original languageEnglish (US)
JournalThorax
DOIs
StateAccepted/In press - Jun 13 2018

Keywords

  • asthma epidemiology
  • tobacco and the lung

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

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    Neophytou, A. M., Oh, S. S., White, M. J., Mak, A. C. Y., Hu, D., Huntsman, S., Eng, C., Serebrisky, D., Borrell, L. N., Farber, H. J., Meade, K., Davis, A., Avila, P. C., Thyne, S. M., Rodríguez-Cintrón, W., Rodríguez-Santana, J. R., Kumar, R., Brigino-Buenaventura, E., Sen, S., ... Burchard, E. G. (Accepted/In press). Secondhand smoke exposure and asthma outcomes among African-American and Latino children with asthma. Thorax. https://doi.org/10.1136/thoraxjnl-2017-211383