Objective To understand the situation of pneumoconiosis incidents in Yuhang District of Hangzhou from 2006 to 2015, and to provide evidence for prevention and control work.
Methods Data of pneumoconiosis incidents in Yuhang District of Hangzhou from 2006 to 2015 were retrieved from the information network reporting system of Chinese Center for Disease Control and Prevention for epidemiological analysis.
Results A total of 277 cases of pneumoconiosis were reported in Yuhang District of Hangzhou from 2006 to 2015. There were 273 male cases (98.6%), 196 cases at pneumoconiosis stage Ⅰ (70.8%), and 263 cases of silicosis (94.9%). Pneumoconiosis cases were most reported in Renhe Subdistrict (209 cases, 75.5%) by geographical distribution. The majority of the pneumoconiosis cases were local residents (247 cases, 89.2%). Silicosis cases were most found in quarrying enterprises and non-metallic mineral products in dustry. Results of Kruskal-Walls H rank test showed that there were significant differences in age of first diagnosis, age of dust exposure, and age of first dust exposure among different stages of pneumoconiosis. The median age of patients with first diagnosis as stage Ⅲ was 6.3 and 6.2 years older than that of the patients with first diagnosis as stage Ⅰ and Ⅱ, respectively (Z=-47.9, Z=-46.3, P < 0.05). There was no difference in dust exposure years of each stage. The median age of first dust exposure of stage Ⅲ patients was 6.7 years older than that of stage Ⅰ patients (Z=-40.1, P < 0.05).
Conclusion The pneumoconiosis incidents in Yuhang District of Hangzhou City from 2006 to 2015 are mainly local male silicosis cases and occur in workers of quarrying enterprises.
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