Conclusions
We found that the environment in Changchun and Yanji cities, China,
reported a garbage station, purchase furniture within a year, passive
smoking, and utilization of anophelifuge and disinfectant et al 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 may be also associated with decreased lung function.