膝关节骨性关节炎患者下肢等长肌力测试新方法的重测信度

The test-retest reliability of a new measurement of lower extremity isometric muscle strength for patients with knee osteoarthritis

目的 检验功能性蹲屈测试训练系统在膝关节骨性关节炎患者下肢等长肌力测试中的重测信度.方法 由同一测试者在1周内对30例膝关节骨性关节炎患者进行前、后2次双下肢等长肌力测试,最终得到最大等长伸展肌力、最大等长伸展肌力发生时间和平均等长伸展肌力3项测试结果.应用组内相关系数（ICCs）对这3项测试结果进行重测信度的评价.结果 健患侧的最大等长伸展肌力和平均等长伸展肌力的组内相关系数（ICCs）分别为0.87、0.88、0.92和0.89;健患侧最大等长伸展肌力发生时间的组内相关系数（ICCs）分别为0.25和0.41.结论 在应用功能性蹲屈测试训练系统对膝关节骨性关节炎患者进行等长肌力测试的结果中,最大等长伸展肌力和平均等长伸展肌力2项结果具有很好的重测信度,这2项测试结果可以作为膝关节骨性关节炎患者治疗方案选择和康复疗效评判的可靠性指导依据.

Objective To determine the test-retest reliability of functional squat system （FSS） isometric muscle strength tests for patients with knee osteoarthritis. Methods The isometric muscle strength of thirty patientswith knee osteoarthritis （21 males and 9 females; age 45 to 89 years, mean age 68.73 ± 12.19 years） was tested twice within 1 week by the same tester. Three test results were obtained： maximum isometric extension strength, the time to initiate isometric extension and the average isometric extension strength. Intra-class correlation coefficients （ICCs） for the three tests were computed to evaluate their retest reliability. Results The ICCs of the maximum isometric extension strength and average isometric extension strength of the uninvolved and involved extremities were respectively 0.87, 0.88, 0.92 and 0.89. The ICCs of the initiation time for the uninvolved and involved legs were respectively 0.25 and 0.41. Conclusion In these tests of patients with knee osteoarthritis using the functional squat system, both the maximum isometric extension strength and the average isometric extension strength had very good test-retest reliability. These two test results could be used as reliable guidance for treatment and rehabilitation of osteoarthritic knees.