895例尘肺病例中新发病例733例,晋期病例162例。接尘工龄3～5年的患者275例,占尘肺总数的30.72%。尘肺患者的发病年龄主要分布在41～70岁年龄段(83.68%)。壹期尘肺与贰期、叁期尘肺的平均接尘工龄、平均发病年龄的差异有高度统计学意义(P<0.01),纯掘进工种作业人员发病工龄较其他工种短。 Among the 895 newly diagnosed cases of pneumoconiosis, 733 cases were newly diagnosed, and 162 cases were diagnosed as advanced stage. The number of patients with dust in 3 to 5 years of work 275 cases, accounting for 30.72% of the total number of pneumoconiosis. The age of onset of pneumoconiosis patients mainly in the 41 to 70 age group (83.68%). There was a statistically significant difference between the average dusting age and average age of dust pneumoconiosis in stage one and stage II and stage III pneumoconiosis (P <0.01). The working age of the workers in pure heading class was shorter than those in other categories.