4.3. The living environment of children with chronic cough
We found 133 children’s family (31.7%) had smokers among the surrounding. Çolak Yunus[21] et al found that smoking is one of the chronic cough risk factors. The prevalence of chronic cough in the current smokers was 8%. Johannessen Ane[22] et al believed that exposure to environmental tobacco smoke (ETS) is associated with impaired lung function in childhood. ETS might be one of the chronic cough risk factor.
105 children’s (25.0%) home were along the street. Fang Zhangfu[23] et al found that the traffic-related air pollution (TRAP) exposures induced cough hypersensitivity and non-allergic eosinophilic inflammation of airways in guinea-pigs. De Sajal [24] et al found that shopkeepers working in heavily trafficked roadside shops suffer from respiratory morbidity and the risk increases with higher total exposure period. We believe TRAP might be one of the chronic cough risk factor; this is worthy of further investigation.