关键词: 四格移步试验, 平衡功能障碍, 信度, 效度, 儿童

Abstract: Objective To study the reliability and validity of four square step test (FSST) in children with balance dysfunction, so as to provide experimental evidences for clinical evaluation of children with balance dysfunction. Methods A total of 129 children with impaired balance function treated in Shenzhen Children's Hospital between January 2018 and February 2019 were selected as the study subjects.All participants were evaluated by two assessors (A, B) 3 times a week.A was responsible for the first and third evaluation, while B was responsible for the second evaluation.The content of the first evaluation included FSST, Berg Balance Scale (BBS), time up and go test (TUG) and 10-meter walking test (10MWT), with an interval of 3-5 minutes between every two test.The content of the second and third evaluation only included FSST.During the evaluation, the assessors did not discuss with each other and record their own data.Pearson correlation analysis was performed to test the correlation of FSST, BBS, TUG and 10MWT results so as to reflect the reliability of FSST.The inter-rater reliability and re-test reliability of FSST were analyzed, and CDM packet was used to detect the discrimination. Results The correlation coefficients of FSST with BBS, TUG and 10MWT were -0.985 (-0.782--0.605), 0.678 (0.572-0.761) and 0.721 (0.626-0.795) (P<0.001).The reliability and test-retest reliability of FSST were 0.957 and 0.979.The validity value was 0.801-0.989 for differentiating children at different ages, which was 0.707-0.824 for differentiating children with different etiologies. Conclusion FSST has high parallel validity, inter-evaluator consistency reliability and test-retest reliability in evaluating children's balance function, and is worth for clinical application.

Key words: four square step test, balance dysfunction, reliability, validity, children