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Childhood asthma in Beijing, China: a population-based case-control study
Tongzhang Zheng1, Shiru Niu, Baoyu Lu
1Department of Epidemiology and Public Health, Yale School of Medicine, New Haven, CT 06510, USA. tongzhang.zheng@yale.edu
American Journal of Epidemiology
|November 7, 2002
Summary
Environmental factors like secondhand smoke, coal use for heating/cooking, indoor mold, and pests are linked to increased childhood asthma risk in China. These findings highlight key areas for public health interventions to protect children
Area of Science:
- Environmental Health
- Pediatric Respiratory Medicine
- Epidemiology
Background:
- Childhood asthma is a significant public health concern globally.
- Limited research exists on childhood asthma risk factors in China, the world's most populous country.
- Understanding environmental triggers is crucial for developing targeted prevention strategies.
Purpose of the Study:
- To investigate environmental risk factors associated with childhood asthma in China.
- To identify specific exposures linked to increased asthma prevalence in a Chinese population.
Main Methods:
- A population-based case-control study was conducted in Shunyi County, China.
- Data collection occurred between January 1999 and March 2001.
- Statistical analysis, including odds ratios (OR) and 95% confidence intervals (CI), was used to assess risk.
Main Results:
- Exposure to secondhand smoke during pregnancy and childhood showed increased asthma risk (OR=1.3-1.4).
- Use of coal for heating (OR=1.5) and unventilated coal cooking (OR=2.3) were significant risk factors.
- Indoor environmental factors like mold (OR=1.8) and pests such as cockroaches and rats (OR=1.8) were associated with higher asthma risk.
- Pet ownership (dog and cat, OR=1.5) also showed a potential link.
Conclusions:
- Environmental exposures, including secondhand smoke, indoor air pollution from coal, mold, and pests, are associated with childhood asthma in China.
- Findings underscore the need for improved indoor environments and reduced exposure to environmental tobacco smoke.
- Public health initiatives should focus on mitigating these identified risk factors to reduce the burden of childhood asthma.