Prevalence And Prediction Of Coal Workers' Pneumoconiosis In A Mine In Tiefa Colliery

ObjectiveCoal worker's pneumoconiosis refers to coal dust production workers exposed to long-term inhalation of dust pneumoconiosis caused by a generic term. Pneumoconiosis total of nearly 50%of cases,and is an irreversible occupational diseases.Coal mine workers suffering from pneumoconiosis,lose the ability to work to shorten life expectancy,which has seriously affected the physical and mental health of mine workers.According to the State Coal Mine Safety Supervision Bureau of the 23 provinces and cities large and medium-sized coal mine survey shows that only 2005 new coal worker's pneumoconiosis patients have 5629 people,the death toll 2470,and the new coal workers pneumoconiosis were still 1 per year.5～20,000 cases of the speed of growth is mine and other industrial accidents,the number of deaths was more than three times.Therefore,the incidence of coal worker's pneumoconiosis have Situation and clarify the existing conditions of coal worker's pneumoconiosis disease incidence trends and make forecasts,will help the Government to take appropriate control measures.As the study of the subject of investigation Teifa colliery,in the 1950s development and construction of the miners into the mine after the liberation of most of the locals,and the relatively stable.This study analyzed the certain mines of Teifa colliery in a self-built mine has been all workers exposed to dust of coal worker's pneumoconiosis and the incidence of the law.To the mine workers exposed to dust to dust participate in the work of the age,length of service and the types of work exposed to coal worker's pneumoconiosis the prevalence and incidence of the analysis and prediction of illness so far surviving workers exposed to dust the number of possible future incidence.To further study the health of workers exposed to dust levels to provide dynamic changes of the law on the basis of comparative information for the building of the incidence of coal worker's pneumoconiosis provide the basis for evaluation system.Methods1.We used the forms of "The Investigation of Workers With Coal Worker's pneumoconiosis "and "The Investigation of Workers Without Coal Worker's Pneumoconiosis" on the Teifa colliery were all in a mining area with more than one year of a history of exposure to dust from coal mines and coal worker's pneumoconiosis workers who investigate cases.Have all the workers exposed to dust mine information to the database as the basis,people of all coal workers pneumoconiosis disease information in the database on the basis of the mine,and the group of occupational diseases by hospital workers verify.Diagnosis based on the development of pneumoconiosis in accordance with national diagnostic criteria to occupational dust exposure exact history is the prerequisite for X-ray post-anterior chest films based on the reference subjects with a series of chest radiography and the unit silicosis incidence,from the hospital occupational group composed of general practitioners,diagnostic group for diagnosis.2.All data was used to foxpro6.0 to record.the data was confirmed and logic to check mistaken.We used SAS8.2 to made statistical treatment..SAS8.2 was used to analysis the data of 4807workers in certain mine of Tiefa colliery.Analysis of the incidence of coal worker's pneumoconiosis factors,the risk factors of different control under the conditions of service of other mine workers,and other types of work, different to mine the coal worker's pneumoconiosis cumulative prevalence rate and the distribution of differences.The life-table test was used to analysis the cumulative incidence rate of CWP,the difference between which was tested by the Log Rank test. The difference of incidence age,the incidence work duration among different diagnosis years was tested by ANOVA.P＜0.05 was significant.3.Life table method to predict the onset mine coming years may be the number. For a five-year period of time,to begin to dust of time as the basis,divided into 1960 before,1960-1965,1965-1970,1970-1975 and 1975 after five different age cohort exposed.Were exposed to different calculation of the participants exposed workers to December 31,2004 of coal worker's pneumoconiosis cumulative prevalence rate,then to seek different dust of the coal worker's pneumoconiosis,the average incidence rate. Participate in the investigation of the different operations have so far been exposed to dust from coal worker's pneumoconiosis workers exposed to dust the age distribution to local residents male life expectancy statistics on the basis of the forecast participate in different operations have so far been exposed to dust from coal worker's pneumoconiosis of workers exposed to dust all age groups The number of coal worker's pneumoconiosis,every age group incidence of the future and the next few years,the number of coal worker's pneumoconiosis number expected incidence.ResultsTo December 31,2004,the mine workers exposed to dust accumulated a total of 4888 people,of whom,81 were lost to follow,not with 4747 workers exposed to dust, coal workers pneumoconiosis patients 60.The coal worker's pneumoconiosis patients began to dust the age of 21.41±4.26 years old,age of onset for 54.34±8.99 years old,the incidence of service for 24.04±6.47 years.Coal workers pneumoconiosis were mainly in 1965 before the mine started all exposed workers,accounted for 80 percent,1965-1975 and 1975,respectively 18.3%and 1.67%.The survey results showed that all the ore,types and length of exposure affect the pathogenesis of coal worker's pneumoconiosis important risk factors(p＜0.01).Coal worker's pneumoconiosis with cumulative prevalence rate of the mine after the transfer and was decreasing.Before 1965 all mine workers exposed to dust coal worker's pneumoconiosis prevalence rate was 3.85%,1965-1975 and 1975 respectively,after the cumulative prevalence rate of 1.79%and 0.112%,a statistically significant difference(P＜0.05);Driving trades workers exposed to dust accumulation of coal worker's pneumoconiosis patients was significantly higher than that of other types of work,different types of workers exposed to coal worker's pneumoconiosis cumulative prevalence rates were:Drillers 17.75%,2.87%for mining,mixed 2.98%(p＜0.01),Assisted in the queue for a coal worker's pneumoconiosis with all its coal worker's pneumoconiosis cumulative prevalence rate was 0;coal mine workers exposed length of＞30 years of coal worker's pneumoconiosis cumulative prevalence rate significantly higher than those exposed length of 20-30 years and＜20 years of dust-exposed workers(P＜0.05),the longer the length of exposure its coal worker's pneumoconiosis cumulative prevalence rate higher.prediction coal worker's pneumoconiosis disease after several years the number of possible results showed that:in 1960 before,1960-1965,1965-1970,1970-1975 and 1975 after five different times to participate in the operation of dust coal dust-exposed workers The expected incidence of pneumoconiosis were 7,2,2,4 and 5,a total of about 20 people.1960 of them to participate in the pre-exposed workers as the main operating incidence crowd of about 7,accounting for 34.2%of the total.Results from the analysis can be seen in the incidence mainly concentrated in the next 20 years,a total of 18 people,the total number of expected incidence of 84.6%.ConclusionCountries and relevant departments of the various laws and regulations to improve the control of coal worker's pneumoconiosis play an important role,to a large degree of control over the occurrence of coal worker's pneumoconiosis and development,the protection of workers exposed to dust of physical and mental health.This study shows that the information coal workers each year to reduce the incidence of pneumoconiosis, coal worker's pneumoconiosis with the prevalence rate in the mine after the shift was gradual downward trend.Forecast for coal worker's pneumoconiosis number of new cases concentrated in the next 20 years,but as time goes by,gradually reduce the number of its incidence,with 1960 former workers exposed to dust as the main operating incidence crowd.Driving the incidence of serious,should focus on strengthening the mine tunneling health workers and the management of dust and possible future disease prevention work the crowd.At the same time,and do a good job of coal workers pneumoconiosis the health care work.