The aim of this study was to examine the intraobserver reliability of a posturographic assessment in patients with low back pain. We investigated 24 symptomatic subjects with defined low back pain (mean: 57.9 years) and a pair-matched control group including 24 asymptomatic persons (mean: 58.1 years). Each participant underwent two measurements on a posturographic device (32 Hz sampling rate) based on the Interactive Balance System (time interval: 7 d). Test procedure consisted of tests on solid ground with eyes open (1) and eyes closed (2). Data analysis included parameters of motor output and a frequency band analysis. Reliability tests were realized using by intraclass correlations (ICC). Coefficients of ICC ranged from 0.36 (95% CI: 0.01-0.73) to 0.94 (95% CI: 0.86-0.97) in both test positions. For 69% (11/16) of the investigated parameters a high level (ICC > 0.75) of intraobserver reliability was reached. Based on the results, the posturographic measurement system used in this study seems to be appropriate for use in longitudinal study designs in an orthopaedic setting.

中文翻译：

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下腰痛会影响姿势调节的可靠性吗？

这项研究的目的是检查腰背痛患者进行术后X线摄影评估的信度。我们调查了24名有明确腰痛症状的受试者（平均：57.9岁）和成对配对的对照组，其中包括24名无症状者（平均58.1岁）。每个参与者都在基于交互式天平系统（时间间隔：7 d）的后置设备上（32 Hz采样率）进行了两次测量。测试程序包括在坚实的地面上进行测试，睁眼（1）闭眼（2）。数据分析包括电动机输出参数和频带分析。可靠性测试是通过类内相关性（ICC）实现的。在两个测试位置中，ICC的系数范围从0.36（95％CI：0.01-0.73）到0.94（95％CI：0.86-0.97）。对于69％（11/16）的调查参数，观察者内部可靠性达到了很高的水平（ICC> 0.75）。根据结果​​，本研究中使用的姿势测量系统似乎适合在整形外科环境中的纵向研究设计中使用。