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Application of means of surfaces with nonhomogeneity in estimating the incidence of pneumoconiosis
Pages: 41-43
Year: Issue:  1
Journal: Chinese Journal of Industrial Hygiene and Occupational Diseases

Keyword:  Means of surfaces with stratified non-homogeneityPneumoconiosisForecasting;
Abstract: Objective To investigate the value of means of surfaces with nonhomogeneity (MSN) in estimating the incidence of pneumoconiosis.Methods Based on the principal component analysis,all counties (districts) of Hebei Province,China,were divided into three categories according to the degree of pneumoconiosis hazards and the MSN model was used to estimate the incidence rate of pneumoconiosis and the number of pneumoconiosis cases using the data of the incidence of pneumoconiosis in 2010.Results With reference to the application requirements of the MSN model,results of the principal component analysis,and expert experience,the 172 counties (districts) in Hebei Province were divided into three categories with mild,moderate,and severe pneumoconiosis hazards.There were 74,61,and 49 counties in the above categories,respectively,and 12,12,and 25 counties were selected from them,respectively.The estimated number of pneumoconiosis cases in Hebei Province was 2105,and the incidence rate was 261.5 per hundred thousand,with a standard error of estimation of 389.9 per hundred thousand.Conclusion The MSN model provides a new thought and method for estimating the nunber of pneumoconiosis cases.
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