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Impairment magnification during dynamic trunk motions.

机译：动态躯干运动过程中的损伤放大率。

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摘要

STUDY DESIGN: An examination of a group of patients with low back disorder and a group of healthy (asymptomatic) individuals asked to produce trunk motions under sincere and insincere experimental conditions. Trunk motion components were examined to determine which combination of motion components could best distinguish between sincere and insincere efforts. OBJECTIVE: To determine whether examination of trunk motion components could be used to identify impairment magnification during unresisted repeated bending tasks. SUMMARY OF BACKGROUND DATA: Trunk motion measures can be used to assess and "benchmark" the status of the low back. However, these measures typically are clinically useful only if the individual is producing an effort that does not magnify the impairment during the functional evaluation. This study addressed the issue of impairment magnification during the production of free dynamic trunk motion. METHODS: The trunk motion characteristics of 100 healthy individuals and 100 patients with chronic low back disorders were documented. All participants were asked to produce the trunk motions in two different types of conditions. In the one experimental condition, they were asked to produce sincere trunk motions. In the other experimental condition they were asked to pretend either that they were experiencing low back pain (the asymptomatic group) or that their pain was worse than it actually was (group with low back pain). RESULTS: A combination of trunk motion measures was able to distinguish well between the conditions. Sensitivity and specificity for the asymptomatic group were 92%, whereas they were 75% for the group with low back pain. Overall, sensitivity and specificity were 81.5% for all the participants combined. CONCLUSIONS: These results indicate that motion measures can be used to help assess impairment magnification during functional trunk motion testing. These measures can provide a means by which to scrutinize the quality of quantitative measures indicating the extent of a low back disorder. These objective motion measures also can be used to complement other subjective observational methods for the assessment of impairment.
机译：研究设计：对一组下背部疾病患者和一组健康（无症状）个体的检查，要求他们在真诚和不真诚的实验条件下进行躯干运动。检查躯干运动成分以确定哪种运动成分最能区分真诚和不真诚的努力。目的：确定躯干运动成分的检查是否可用于确定无抵抗的重复弯曲任务期间的损伤放大率。背景数据摘要：躯干运动测量可用于评估和“基准化”腰背的状态。但是，这些措施通常仅在个人做出的努力在功能评估过程中不扩大损害的情况下才在临床上有用。这项研究解决了自由动态躯干运动产生过程中损伤放大的问题。方法：记录了100名健康人和100名慢性下腰部疾病患者的躯干运动特征。要求所有参与者在两种不同类型的条件下进行躯干运动。在一种实验条件下，要求他们进行真诚的躯干运动。在其他实验条件下，要求他们假装自己正经历腰痛（无症状组），或者他们的疼痛比实际情况更严重（腰痛组）。结果：躯干运动测量的组合能够很好地区分这些情况。无症状组的敏感性和特异性为92％，而腰痛组为75％。总体而言，所有参与者的敏感性和特异性为81.5％。结论：这些结果表明运动测量可用于帮助功能性躯干运动测试期间评估损伤放大率。这些措施可以提供一种手段来检查指示腰背疾病程度的定量措施的质量。这些客观运动量度还可用于补充其他主观观察方法以评估损伤。

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