机械类切割伤害风险评估指标体系的验证及优化

摘要

Objective To validation and optimization the indicator system of risk assessment for mechanical cuts. Methods The risk assessment index system of mechanical cutting injury established earlier was used to assess the risk of mechanical cutting injury in 40 cases of mechanical cutting injury registered from January 2015 to December 2017 and 40 similar positions without accidents in the same period. The multiple stepwise regression analysis was used to screen the indicator system, and to adjust the weight coefficient of each index. The total coincidence rate and Kappa value were compared between before and after optimization respectively. Results The new index system has 3 first-class indicators,10 second-class indicators and 14 three-class indicators, fewer than the old index system which has 3 first-class indicators, 10 second-class indicators, 34 three-class indicators. There three indicators have revamped in the first-class. The total of coincidence rates of the new and old indicator systems were 67.50% and 90.00% , the difference was statistically significant ﹙P<0.01﹚. The Kappa value were 0.35 and 0.80,respectively. Conclusion The evaluation results with new indicator systems is more consistent with the actual hazard detection the the old indicator systems, and scientific, reasonable and practical, and the indicator system of risk assessment for mechanical cuts can be used for the risk assessment of mechanical cutting injuries.%目的 验证并优化前期建立的机械类切割伤害风险评估指标体系.方法 应用前期建立的机械类切割伤害风险评估指标体系对2015年1月至2017年12月登记的40例机械类切割伤患者所在岗位和40个未发生事故的机械类岗位进行机械切割伤害风险评估,采用多元逐步回归分析法对指标体系进行筛选,建立新的评估指标体系和调整各指标权重系数,并通过总体符合率和Kappa值比较优化前后指标体系的一致性.结果 优化后指标体系由原来的一级指标3项,二级指标10项,三级指标34项减少到一级指标3项,二级指标10项,三级指标14项,其中二级指标修改3项.优化前后指标体系风险评估等级与机械岗位实际发生切割伤害事故的总体符合率分别为67.50%和90.00%(Kappa=0.35、0.80).优化前后指标体系总体符合率比较,差异有统计学意义(χ2=64.908,P<0.01).结论 优化后新的指标体系优于原指标体系,评估结果与实际危害发生情况一致性更高,新指标体系可用于机械类切割伤害风险评估.