risk-based analysis of construction accidents in iran during 2007-2011-meta analyze study.

the present study aimed to investigate the characteristics of occupational accidents and frequency and severity of work related accidents in the construction industry among iranian insured workers during the years 20072011.the iranian social security organization (isso) accident database containing 21,864 cases between the years 2007-2011 was applied in this study. in the next step, total accident rate (tra), total severity index (tsi), and risk factor (rf) were defined. the core of this work is devoted to analyzing the data from different perspectives such as age of workers, occupation and construction phase, day of the week, time of the day, seasonal analysis, regional considerations, type of accident, and body parts affected.workers between 15-19 years old (tar=13.4%) are almost six times more exposed to risk of accident than the average of all ages (tar=2.51%). laborers and structural workers (tar=66.6%) and those working at heights (tar=47.2%) experience more accidents than other groups of workers. moreover, older workers over 65 years old (tsi=1.97%> average tsi=1.60%), work supervisors (tsi=12.20% >average tsi=9.09%), and night shift workers (tsi=1.89% >average tsi=1.47%) are more prone to severe accidents.it is recommended that laborers, young workers, weekend and night shift workers be supervised more carefully in the workplace. use of personal protective equipment (ppe) should be compulsory in working environments, and special attention should be undertaken to people working outdoors and at heights. it is also suggested that policymakers pay more attention to the improvement of safety conditions in deprived and cold western regions.