Introduction:The correspondence analysis method is the best method to optimize matrix functions by which the risk-injury matrix was analyzed. This method can reduce the information contained in the risk-injury table and can also determine the correlation between the variables in the matrix. The aim of this study was to present the dimensions of accidents and occupational hazards based on the risk-injury affinity groups, and to manage the occupational accidents using these dimensions. Methods: In this study, the reports of occupational accidents registered in the Social Security Organization in a period of ten years from the beginning of 2005 until the end of 2014 (222,300 incidents) were collected and the type of the risk and injury related to any accident was identified based on the criteria of the International Labour Organization and classified in a risk-injury matrix (18 × 18). Using the correspondence analysis, the dimensions were identified individually; these dimensions show the most correlation between risks and injuries, which can facilitate decision-making in the risk assessment process in companies covered by the Social Security Organization. Results: Hair's criterion recommends that dimensions with inertia higher than 0.2 are suitable for the study and interpretation of the results. So, in this study, among the obtained dimensions, the dimensions with the inertia (an eigen value) greater than 0.2 including dimension 1, dimension 2, and dimension 3 were considered and the correlation between the variables was obtained based on a singular value (variable distance from the centeroid). In this study, a singular value of dimension1 was 0.750, a singular value of dimension 2 was 0.647, and a singular value of dimension 3 was 0.521.
Conclusions:The dimensions obtained create new opportunities for the development of applications to analyze, interpret and automatic management of occupational accidents to minimize uncertainty and increase the objectivity that is not achievable with the current methods. The findings of the present study confirm that these three dimensions indicate the summary of occupational injuries.