5. Conclusions
We found that environment in Changchun and Yanji cities, China, reported a garbage station, noise or heating company in 100m around the home, purchase furniture within a year, passive smoking, and utilization of anophelifuge and disinfectant may be the risk factors for respiratory diseases among school-aged children. A garbage station or noise around the home, close to the main traffic road, low frequency of opening windows in winter, passive smoking and using liquid gas as the main cooking fuel may be also associated with decreased lung function.