3米后向步行试验评估脑卒中患者动态平衡功能的信效度和反应性

目的：检验3米后向步行试验（3MBWT）在脑卒中患者动态平衡功能评估中的信效度和反应性。方法：选取2020年12月至2021年6月温州医科大学附属第二医院40例脑卒中患者，完成3MBWT、Berg平衡量表（BBS）、“计时-起立-行走”测试（TUGT）和改良版Barthel指数（MBI）后进行Spearman相关分析。两位护理人员分别测试同一患者的3MBWT,2 h后其中1名研究人员重新测试该患者的3MBWT，计算组内相关系数（ICC）。治疗1周后，40例患者再次测试3MBWT、BBS和TUGT，比较3种工具对治疗前后效果的反应性。结果：3MBWT重测信度检验显示ICC值为0.889，评定者间信度ICC值为0.998;3MBWT与BBS(r=-0.854,P<0.001)、TUGT(r=0.872,P<0.001)强相关，3MBWT与MBI中度相关（r=-0.519,P<0.001）；|ES|和|ERM|值排序依次为3MBWT>TUGT>BBS。结论：3MBWT在评价卒中患者动态平衡功能中具备良好的信度、效度和反应性。

Reliability and validity of the 3-meter backward walk test in evaluating dynamic balance function in the stroke population

Objective: To test the reliability, validity and responsiveness of 3-meter backward walk test (3MBWT) in the evaluation of dynamic balance function in stroke patients. Methods: From December 2020 to June 2021, 40 stroke patients from the Second Affiliated Hospital of Wenzhou Medical University completed 3MBWT, Berg Balance Scale (BBS), the timed up and go test (TUGT) and modified Barthel Index (MBI) for Spearman correlation analysis. Two researchers completed the 3MBWT of the same patient separately. One of the researchers retested the 3MBWT of the same patient 2 hours later and calculated the intraclass correlation coefficient (ICC). After one week of treatment, 3MBWT, BBS and TUGT were retested in 40 patients to compare the reactivity of the three tools. Results: The retest ICC of 3MBWT was 0.889 and the inter-rater ICC was 0.998; 3MBWT was strongly correlated with BBS (r=-0.854, P<0.001), TUGT (r=0.872, P<0.001), and 3MBWT was moderately correlated with MBI (r=-0.519, P<0.001). The order of |ES| and |ERM| values is 3MBWT>TUGT>BBS. Conclusion: 3MBWT has good reliability, validity and reactivity in evaluating dynamic balance function in stroke patients.