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Childhood morbidity and air pollution in the Teplice program
M Dostál1, I Hertz-Picciotto, R James
1Institute of Exp. Medicine, Academy of Sciences, Prague, Czech Republic. dostal@biomed.cas.cz
Insights
Children in high air pollution areas had more infections. This study suggests environmental factors like air quality may impact early childhood disease susceptibility.
Area of Science:
- Environmental Health
- Pediatric Epidemiology
- Respiratory Medicine
Background:
- A comparative study assessed childhood morbidity in two Czech Republic districts with differing air pollution levels.
- Teplice district is known for high air pollution, while Practice district has lower exposures to particulates and sulfur dioxide (SO2).
Purpose of the Study:
- To investigate the association between air pollution exposure and childhood morbidity in young children.
- To compare the incidence of various infections in children residing in high vs. low air pollution environments.
Main Methods:
- Follow-up study of 452 children from birth up to three years of age.
- Morbidity data extracted from pediatric records, with diagnoses coded using the International Classification of Diseases--10th edition.
- Statistical analysis using multiple linear regression models adjusted for potential confounding factors.
Main Results:
- Children born in the high air pollution district (Teplice) showed significantly higher rates of otitis media, otalgia, gastrointestinal infections, upper respiratory infections, and pneumonia.
- No significant differences in the risk of bronchitis or viral infections like varicella were observed between the districts.
- Findings persisted after adjusting for socioeconomic factors, maternal characteristics, and daycare attendance.
Conclusions:
- High air pollution may increase early childhood susceptibility to certain infections.
- Potential confounding factors include diagnostic variations, parental healthcare-seeking behaviors, and limitations in controlling for all environmental influences.
Background:
A study of morbidity of children aged 0 to 3 years was conducted in two districts in the Czech Republic. Comparisons were made between children living in Teplice district, known for its high air pollution, and children living in Practice, a district with consistently lower particulate and SO2 exposures.
Methods And Results:
The children were selected for the follow up based on deliveries from May 1994 to December 1966. Childhood morbidity during the first three years of life of 452 children was extracted from their pediatric records. Diagnoses were coded using the International Classification of Diseases--10th edition, and categorized into broad groupings. Children born in Teplice experienced a significantly higher rate of otitis media and otalgia, gastrointestinal infections, upper respiratory infections, and pneumonia, but did not differ in their risk for bronchitis or for viral infections such as varicella. These findings remained after multiple linear regression models adjusted for education, maternal age, maternal smoking, and other smokers in the household, breastfeeding, and attendance at day care.
Conclusions:
Air pollution may alter early childhood susceptibility to infection, but other differences between the districts must be considered: systematic diagnostic differences for several health outcomes comparing pediatricians in Teplice vs. Practice, differences in health-care seeking behavior by the parents, and inadequate control for confounding.