Predictive validity of the strain index in manufacturing facilities.
Predictive validity of the strain index in manufacturing facilities.
复制标题
制造设施中应变指数的预测有效性。
DOI：
10.1080/104732202753306177
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
J. Moore
中科院分区：
文献类型：
--
作者：
N. Rucker;J. Moore
应变指数是一种工作分析方法，用于确定工人是否暴露于患上肢远端疾病的风险增加。它的预测和外部有效性，初步证明了在猪肉加工厂。本研究的目的是评估其预测效度在两个制造厂。在对健康结果不知情的情况下，研究人员使用应变指数分析了28项单任务工作的右侧和左侧，并根据应变指数评分将其分为“危险”或“安全”。随后，OSHA 200日志被用来确定远端上肢疾病的发生回顾性。如果在过去的三年中，至少有一个这样的疾病发生在右侧或左侧，则该侧被归类为“阳性”。如果在过去的三年里没有这种疾病的报告，那一侧被归类为“阴性”。“在比较双方时，发病率和危险分类之间需要对称。在比较工作时，不需要这种对称性。使用2x2列联表评估了56侧和28个工作的危害分类和发病率分类之间的关联证据。对于两侧，危险分类和发病率分类之间的关联具有统计学意义，经验优势比为73.2。灵敏度、特异度、阳性预测值和阴性预测值分别为1.00、0.84、0.47和1.00。类似的结果也被注意到，经验优势比为106.6，灵敏度，特异性，阳性预测值和阴性预测值分别为1.00，0.91，0.75和1.00。虽然这些结果为应变指数的外部有效性和预测有效性提供了额外的证据，但应该注意的是，这些工作涉及单一任务的执行。
The Strain Index is a job analysis method for determining if workers are exposed to increased risk of developing distal upper extremity disorders. Its predictive and external validity was initially demonstrated in a pork processing plant. The purpose of this study was to evaluate its predictive validity in two manufacturing plants. While blinded to health outcomes, investigators analyzed the right and left sides of 28 single-task jobs using the Strain Index and classified them as "hazardous" or "safe" based on the Strain Index score. Subsequently, OSHA 200 logs were used to ascertain the occurrence of distal upper extremity disorders retrospectively. If at least one such disorder occurred on the right or left side during the prior three years, that side was classified as "positive." If no such disorder was reported during the prior three years, that side was classified as "negative." When comparing sides, symmetry between morbidity and hazard classification was required. When comparing jobs, such symmetry was not required. Evidence of association between the hazard classifications and the morbidity classifications for the 56 sides and the 28 jobs was evaluated using 2 x 2 contingency tables. For the sides, the association between hazard classification and morbidity classification was statistically significant with an empirical odds ratio of 73.2. The sensitivity, specificity, positive predictive value, and negative predictive value were 1.00, 0.84, 0.47, and 1.00. Similar results were noted for the jobs--the empirical odds ratio was 106.6, and the sensitivity, specificity, positive predictive value, and negative predictive value were 1.00, 0.91, 0.75, and 1.00. While these results provide additional evidence of the Strain Index's external validity and predictive validity, it should be noted that these jobs involved the performance of single tasks.