Environmental Pollutants and Their Impact on Asthma and Allergy in Adolescents
Author Information
Author(s): Hassen Hamid Y., Govarts Eva, Remy Sylvie, Cox Bianca, Iszatt Nina, Portengen Lützen, Covaci Adrian, Schoeters Greet, Den Hond Elly, Henauw Stefaan De, Bruckers Liesbeth, Koppen Gudrun, Verheyen Veerle J.
Primary Institution: Flemish Institute for Technological Research (VITO)
Hypothesis
What is the association between environmental pollutants and asthma/allergy in adolescents, and how do oxidative stress and immune markers mediate this relationship?
Conclusion
The study found that exposure to certain phthalates is linked to increased airway inflammation in adolescents, mediated by eosinophil counts.
Supporting Evidence
- MnBP and MBzP were associated with increased FeNO levels.
- Eosinophil count mediated the relationship between phthalates and FeNO.
- 8-OHdG mediated the association between certain pesticides and rhinitis.
- PCBs were linked to increased risk of eczema in single pollutant analysis.
Takeaway
This study shows that some chemicals in the environment can make kids' asthma worse by affecting their immune system.
Methodology
The study analyzed data from the Flemish Environment and Health Study, examining associations between pollutants and asthma/allergy outcomes using regression models.
Potential Biases
Potential recall bias in self-reported health outcomes and unmeasured confounding factors.
Limitations
The cross-sectional design limits causal inference, and self-reported health outcomes may introduce bias.
Participant Demographics
Adolescents aged 13-16 years, with 46% boys and 62% from households with high education levels.
Statistical Information
P-Value
0.018 for eosinophil mediation of MBzP and FeNO
Confidence Interval
95% CI: 6, 36% for FeNO increase per IQR of MnBP
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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