Fredriksson K, Toomingas A, Torgén M, Thorbjörnsson C B, Kilbom A
National Institute for Working Life, Department for Work and Health, Solna, Sweden.
Scand J Work Environ Health. 1998 Oct;24(5):425-31.
The aim was to study the reliability and validity of retrospective data, collected by self-report, on sick leave related to musculoskeletal diseases.
The study groups consisted of 66 and 306 subjects, for the reliability and validity studies, respectively. They were all part of a wider study of risk factors for musculoskeletal disorders, the REBUS study, conducted in Stockholm in 1993. Reliability was tested using a test-retest design regarding self-reported sick leave related to musculoskeletal diseases in 1970-1993. The validity study comprised the period 1990-1994. Self-reported and registered sick-leave data related to musculoskeletal diseases were collected and analyzed regarding concordance. Data about current musculoskeletal disorders and different work-related conditions were collected and analyzed regarding possible effect- and exposure-dependent misclassification.
The test-retest reliability study showed the percentage of agreement to be between 0.88 and 0.97, and the kappa values were between 0.73 and 0.93. The validity study of the concordance between the self-reported and registered data showed high agreement and specificity, but the sensitivity was sometimes lower. All the kappa values exceeded 0.50. No effect- or exposure-dependent misclassification was found.
The validity of retrospectively collected self-reported sick-leave data was sufficient for use as a measure of musculoskeletal morbidity in the analyses of associations with work-related conditions. Because of the relatively low sensitivity, such data will underestimate the prevalence of sick leave and should not be used for surveys of morbidity.
本研究旨在探讨通过自我报告收集的与肌肉骨骼疾病相关病假的回顾性数据的可靠性和有效性。
分别有66名和306名受试者参与可靠性和有效性研究。他们均是1993年在斯德哥尔摩开展的一项关于肌肉骨骼疾病危险因素的更广泛研究（REBUS研究）的一部分。采用重测设计对1970 - 1993年期间自我报告的与肌肉骨骼疾病相关的病假情况进行可靠性测试。有效性研究涵盖1990 - 1994年期间。收集并分析自我报告和登记的与肌肉骨骼疾病相关的病假数据的一致性。收集并分析有关当前肌肉骨骼疾病和不同工作相关状况的数据，以探讨可能的效应和暴露依赖性错误分类。
重测可靠性研究显示一致性百分比在0.88至0.97之间，kappa值在0.73至0.93之间。自我报告数据与登记数据一致性的有效性研究显示出高度一致性和特异性，但敏感性有时较低。所有kappa值均超过0.50。未发现效应或暴露依赖性错误分类。
回顾性收集的自我报告病假数据的有效性足以在分析与工作相关状况的关联时用作衡量肌肉骨骼发病率的指标。由于敏感性相对较低，此类数据会低估病假患病率，不应将其用于发病率调查。
