Abstract
Background
Organophosphate esters (OPEs) are ubiquitously detected in environments and their exposure may affect respiratory health. However, epidemiological evidence, particularly among adolescents, is very limited.
Objective
We aimed to investigate the associations of urinary OPEs metabolites with asthma and lung function among adolescents and to identify potential effect modifiers.
Methods
Included were 715 adolescents aged 12–19 years old participating in the National Health and Nutrition Examination Survey (NHANES) 2011–2014. Multivariable binary logistic regression and linear regression were used to assess associations with asthma and lung function, respectively. Stratified analyses were conducted to assess the effect modifications of serum sex hormones, vitamin D levels, and body mass index (BMI).
Results
After multivariable adjustment, we found that bis(2-chloroethyl) phosphate (BCEP) (3rd tertile [T3] vs 1st tertile [T1], OR = 1.87, 95% CI: 1.08, 3.25; P-trend=0.029) and diphenyl phosphate (DPHP) (T3 vs T1, OR = 2.52, 95%CI: 1.25, 5.04; P-trend=0.013) were associated with elevated odds of asthma in all adolescents. Sex-stratified analyses revealed that associations of these two OPEs metabolites tended to be stronger in males. Meanwhile, BCEP and the molecular sum of OPEs metabolites (∑OPEs) were significantly associated with declined lung function, either in all adolescents or by sex. Furthermore, stratified analyses revealed that positive associations of OPEs metabolites with asthma tended to be stronger among adolescents with insufficient levels of Vitamin D (VD < 50 nmol/L), relatively high levels of total testosterone (≥356 ng/dL and ≥22.5 ng/dL for males and females, respectively), or low levels of estradiol (<19.1 pg/mL and <47.3 pg/mL for males and females, respectively).
Significance
Certain urinary OPEs metabolites, especially DPHP and BCEP, were associated with elevated odds of asthma and declined lung function in adolescents. Such associations might be partly modified by levels of VD and sex steroid hormones.
Impact statement
The observed associations of urinary OPEs metabolites with increased risk of asthma and declined lung function highlight the potential hazard of OPEs exposure to respiratory health among adolescents.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
The authors thank all participants in the NHANES for making this study possible.
Funding
This study was funded by the National Key R&D Program of China (2022YFC3902100) and the Discipline Construction Project of the School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College (2021-EFT-Z-016).
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RA and CD completed data analyses and contributed to the writing of the manuscript. ZX prepared the NHANES data for analysis. YQ reviewed manuscript and provided critical comments. YJ and KL critically revised and edited the manuscripts. All authors approved the final version of the manuscript.
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Aimuzi, R., Dong, C., Xie, Z. et al. Associations of urinary organophosphate esters metabolites with asthma and lung function in adolescents. J Expo Sci Environ Epidemiol (2023). https://doi.org/10.1038/s41370-023-00540-2
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DOI: https://doi.org/10.1038/s41370-023-00540-2