Evaluation of alternate category structures for the Strain Index: an empirical analysis.
Evaluation of alternate category structures for the Strain Index: an empirical analysis.
复制标题
应变指数替代类别结构的评估：实证分析。
DOI：
10.1177/0018720813492548
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发表时间：
2014
期刊：
影响因子：
3.3
通讯作者：
Fethke,NathanB
中科院分区：
文献类型：
--
作者：
Meyers,AlyshaR;Gerr,Fredric;Fethke,NathanB
本研究的目的是建立可供选择的应变指数风险分类。背景应变指数得分通常分为四个应变指数风险类别。最初的风险类别是在肉类加工业发展起来的，可能并不完全适用于其他行业。方法对276名制造业工人进行了一项关于手部肌肉骨骼症状职业危险因素的队列研究，评估了每日紧张指数得分。每个分数都用原来的方法和一种新的方法进行分类，新方法基于有症状的参与者的应激指数分位数。结果与各自的参考类别相比，原始应变指数风险最高的类别(HR=2.06，95%CI=[1.08-3.92])和第二高的替代应变指数风险暴露类别(HR=2.21，95%CI=[1.26-3.85])发生手臂症状的风险增加了一倍或更多。虽然在两种应变指数分类方法中都观察到应变指数风险类别与事件手臂症状之间的显著关联，但模型拟合统计更倾向于替代方法。结论本研究的结果表明，应变指数风险类别结构可能需要针对特定人群进行定制。应用如果得到验证，本研究结果提供了一种更好的方法来识别危险的制造工作并将其作为减少暴露的目标。
ObjectiveThe purpose of this study was to develop alternative Strain Index risk classification categories.BackgroundStrain Index scores are usually categorized into four Strain Index “risk categories.” The “original” risk categories were developed in the meat-packing industry and may not be fully applicable to other industries.MethodDaily Strain Index scores were estimated among 276 manufacturing workers participating in a cohort study of occupational risk factors for hand–arm musculoskeletal symptoms. Each score was categorized using the original method and a new method based on quartiles of Strain Index score values among symptomatic participants. Models examining associations between original Strain Index risk categories and incident hand–arm symptoms were compared to models examining associations between the alternative Strain Index risk categories and incident hand–arm symptoms.ResultsCompared to the respective referent categories, a twofold or greater increase in the risk of incident hand–arm symptoms was observed for the highest original Strain Index risk category (HR = 2.06, 95% CI = [1.08–3.92]) and for the second highest alternate Strain Index risk exposure category (HR = 2.21, 95% CI = [1.26–3.85]). Although significant associations between Strain Index risk category and incident hand–arm symptoms were observed for both Strain Index categorization methods, model fit statistics favored the alternate approach.ConclusionResults from this study suggests that the Strain Index risk category structure may need to be tailored to specific populations.ApplicationIf verified, results from this study provide a better way to identify hazardous manufacturing jobs and target them for exposure reduction.