【摘要】 目的探讨圆形分布在职业伤害中的应用,揭示职业伤害的时间分布特征。方法回顾性研究某有色金属企业20 a来职业伤害的发生情况,圆形分布方法分析发生时间的分布特征。结果职业轻伤4 607例,重伤161例,死亡73例。职业伤害在季节、月份和日期分布上没有集中趋势(P>0.05);在24 h分布多发于中班(8:00~16:00),圆形分布推断高发时段在4:30~17:00。结论职业伤害在24 h分布有集中趋势;圆形分布方法可作为分析职业伤害时间特征的一种统计方法。更多还原

【Abstract】 Objective To investigate the use of circular distribution in occupational injury and explore the characteristics of time distribution of occupational injury.Methods A retrospective study was performed to analyse characteristics of time distribution of occupational injury by circular distribution.Results The amount of occupational injury in the Non Ferrous Metal Company in the last two decades was(4 841),including 4 607 of flesh wound,161 of grievous bodily harm and 73 of dead.No concentrative trend was found on occupational injury by season,month and day other than by hour.While incidence of occupational injury from 8:00 am to 4:00 pm was significantly higher than that of any other hours.Conclusions Concentrative trend of occupational injury was found according to hours.Circular distribution test may be a applicable statistical method to analyze characteristics of occupational injury.更多还原