目的分析煤矿工人尘肺发病特征，为有效防治尘肺提供科学依据。
Objective We aimed to investigate the characteristic of pneumoconiosis on coal miners and provide scientific evidences for its prevention.
疾病控制和预防中心报道指出，在1968年到2006年间，煤矿工人所患的尘肺病导致了28912人死亡，这些人年龄都在25岁及25岁以上。
The Centers for Disease Control and Prevention report that between 1968 and 2006, coal worker's pneumoconiosis was the cause of death for 28, 912 people aged 25 and older.
结果在180例煤矿工人中，患慢性支气管炎的155例，检出率为86．1％，与是否患煤工尘肺无关。
ResultsAmong the 180 deceased coal miners, there were 155 cases of chronic bronchitis, with a prevalence rate of 861%, mainly affecting bronchia and bronchiole.
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