Buchholz Bryan, Park Jung-Soon, Gold Judith E, Punnett Laura
Department of Work Environment, University of Massachusetts-Lowell, Lowell, MA 01854, USA.
Ergonomics. 2008 Jul;51(7):1064-77. doi: 10.1080/00140130801915220.
This study examined the agreement of subjective ratings of upper extremity exposures with corresponding direct measurements obtained simultaneously from workers. Psychophysical ratings of exposure, based on the Borg CR-10 scale, were obtained for the period of time in which direct measurements were acquired using electrogoniometers (wrist), electroinclinometers (shoulder) and electromyography (grip force). Subjects were selected from workers at two automobile manufacturing plants. Significant relationships between subjective ratings of wrist position and measured wrist posture or motion and between ratings of shoulder position and measured shoulder posture were not found. Ratings of manual effort were significantly correlated with directly measured grip force (% maximum voluntary contraction). Ratings of pace were significantly correlated with directly measured wrist motion and this relationship was strengthened with the addition of relative grip force as a covariate. Workers with hand/wrist symptoms provided ratings that were more strongly related to the directly measured exposures than those without symptoms. Self-report by workers is an alternative to more resource-intensive and invasive exposure assessment methods. However, the validity of workers' self-reported exposure assessments has been questioned. The objective of this study was to examine the agreement of selected questionnaire items with corresponding direct measurements from bioinstrumentation and to provide a better understanding of worker self-reports.
本研究考察了上肢暴露主观评分与同时从工人处获得的相应直接测量结果之间的一致性。在使用电子测角仪（手腕）、电子倾斜仪（肩部）和肌电图（握力）进行直接测量的时间段内，基于博格CR - 10量表获得了暴露的心理物理学评分。受试者选自两家汽车制造厂的工人。未发现手腕位置主观评分与测量的手腕姿势或运动之间以及肩部位置评分与测量的肩部姿势之间存在显著关系。手动用力评分与直接测量的握力（最大自主收缩百分比）显著相关。节奏评分与直接测量的手腕运动显著相关，并且在加入相对握力作为协变量后这种关系得到加强。有手/腕部症状的工人提供的评分与直接测量的暴露之间的相关性比无症状工人更强。工人的自我报告是资源密集型和侵入性更强的暴露评估方法的一种替代方式。然而，工人自我报告的暴露评估的有效性受到了质疑。本研究的目的是考察选定问卷项目与生物仪器相应直接测量结果之间的一致性，并更好地理解工人的自我报告。
