A Case Series Of652Pneumoconiosis From2007to2011in Anshan Iron&Steel Group Corporation

ObjectiveThe purpose of this study is to know the epidemiological and clinical features ofpneumoconiosis patients in Anshan Iron&Steel Group Corporation, then toinvestigate the factors that can increase the quality and length of patients life. Thesecan provide scientific evidence to carry out the new law for prevention and cureoccupational disease.MethodsWe used retrospective study to investigate pneumoconiosis patients in the LaborHygiene Research Institute of Anshan Iron&Steel Group Corporation from January2005to December2011. We collected the information of patients such as age, sings,therapy, et al and used χ2test, rank-sum test, variance analysis and q test to analyzethe data.Results①General condition: The meanage of the case was73.6.98.77%of the casewas sillicosis patients, and most of them were in the first stage of pneumosilicosis.25.92%of the patients were smoking. The largest percentage of smoking wasappeared in the third stage of pneumosilicosis (60.41%). There was significantdifference among the stages of pneumosilicosis about smoking.(P<0.001).②Onsetfeatures: The mean year of contacting with dust of patients was27.09.73.06%of thecase first contacted with dust in1950s. Most of the pneumoconiosis patients weredistributed in mining and dressing(34.97%). The mean age of onset in patients was49.78, and mean length of service of onset was28.77. There was no significantdifference among patients in different types of work about the age of onset and thelength of service of onset (P＞0.05). There was significant difference among patientsin different ages of diagnosis about the age of onset and the length of service of onset(P<0.001).③Clinical features: The percentage of patients who had symptoms such as cough, expectoration, cardiopalmus became higher as the pathogenetic conditiondeveloping. The symptoms, complications and functional parameters of lung ofpatients in each stages of pneumosilicosis were significantly different (P＜0.05).④The total cost and the cost of therapy, examination and medicine of patients who werein hospital were increased with years.ConclusionThe main type of pneumoconiosis was silicosis. Most of the patients were maleand older than70years of old. The feathers of harm of the dust were tardive andchronicity. The degree of harm has disparity in different jobs. The age of onset, thelength of service of onset and the promotion year were increased as the lapse of thediagnosed time. Those proved the conspicuous control efficiency to pneumoconiosis.The cost of hospitalization increased as time past. That made the burden of enterpriseand department of MI more serious.