van Dieën J H, Heijblom P
Faculty of Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands.
J Orthop Res. 1996 Jan;14(1):139-43. doi: 10.1002/jor.1100140122.
Testing the capacity of the trunk extensor muscles may be useful in the diagnosis of low back pain. In the present study, the reproducibility of measurements of maximum trunk extension force, trunk extension endurance, and related electromyographic parameters was investigated. Intraclass correlations indicated that the reproducibility of maximum force and endurance time was satisfactory. Nevertheless, the smallest difference in these parameters that could be attributed, with 95% confidence, to a change in the condition of a patient was, in general, more than 20%. On the electromyograms, the slopes of amplitude and frequency content appeared to be related to endurance time. The reproducibility of these parameters in terms of the intraclass correlation was again satisfactory; however, the smallest detectable difference generally exceeded 50%. The clinical applicability of the parameters studied is severely limited by a lack of reproducibility.
测试躯干伸肌的能力可能有助于诊断腰痛。在本研究中，对最大躯干伸展力、躯干伸展耐力及相关肌电图参数测量的可重复性进行了调查。组内相关性表明最大力量和耐力时间的可重复性是令人满意的。然而，一般来说，在95%置信度下可归因于患者病情变化的这些参数的最小差异超过了20%。在肌电图上，振幅和频率成分的斜率似乎与耐力时间有关。这些参数在组内相关性方面的可重复性再次令人满意；然而，最小可检测差异通常超过50%。所研究参数的临床适用性因缺乏可重复性而受到严重限制。
