Psychometric properties of the activities-specific balance confidence scale among individuals with a lower-limb amputation
Psychometric properties of the activities-specific balance confidence scale among individuals with a lower-limb amputation
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DOI：
10.1016/s0003-9993(03)04807-4
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发表时间：
2003-05-01
影响因子：
4.3
通讯作者：
Speechley, M
中科院分区：
文献类型：
--
作者：
Miller, WC;Deathe, AB;Speechley, M
目的：评估下肢截肢者活动特异性平衡置信度 (ABC) 量表的内部一致性、重测信度和构建有效性。设计：重新测试设计。地点：安大略省一所大学附属截肢者诊所。参与者：单侧经胫骨和经股骨截肢者的两个样本。样本 1 (n=54) 是诊所人群所有成员的连续样本，样本 2 (n=329) 是便利样本。干预措施：不适用。主要结果指标：重复应用 ABC 量表，这是一份包含 16 项的问卷，用于评估执行各种与行动相关的任务的信心。测试 ABC 量表与 2 分钟步行 (2MWT) 和定时起立 (TUG) 测试之间假设关系的相关性；并根据截肢原因、截肢水平、移动装置的使用、自动迈步能力、佩戴时间、爬楼梯能力和步行距离评估 ABC 量表区分群体的能力。结果：ABC 量表的重测信度（组内相关系数）为 91（95% 置信区间 [CI]，0.84-0.95），单项重测系数范围为 0.53 至 0.87。通过 Cronbach alpha 测量的内部一致性为 0.95。观察到与 2MWT 和 TUG 测试的假设相关性，相关性分别为 0.72 (95% CI, .56-.84) 和 -.70 (95% CI, -.82 至 -.53)。 ABC 量表对除基于截肢水平的组之外的所有组进行了区分。结论：通过 ABC 量表测量的平衡置信度是一种结构，可为提供截肢者康复的临床医生提供可能有用的独特信息。 ABC 量表是可靠的，对有效性有强有力的支持。建议研究量表的响应性。
Objective: To evaluate the internal consistency, test-retest reliability, and construct validity of the Activities-specific Balance Confidence (ABC) Scale among people who have a lower-limb amputation.Design: Retest design.Setting: A university-affiliated outpatient amputee clinic in Ontario.Participants: Two samples of individuals who have unilateral transtibial and transfemoral amputation. Sample 1 (n=54) was a consecutive and sample 2 (n=329) a convenience sample of all members of the clinic population.Interventions: Not applicable.Main Outcome Measures: Repeated application of the ABC Scale, a 16-item questionnaire that assesses confidence in performing various mobility-related tasks. Correlation to test hypothesized relationships between the ABC Scale and the 2-minute walk (2MWT) and the timed up-and-go (TUG) tests; and assessment of the ability of the ABC Scale to discriminate among groups based on amputation cause, amputation level, mobility device use, automatic stepping ability, wearing time, stair climbing ability, and walking distance.Results: Test-retest reliability (intraclass correlation coefficient) of the ABC Scale was 91 (95% confidence interval [CI], .84-.95) with individual item test-retest coefficients ranging from .53 to .87. Internal consistency, measured by Cronbach alpha, was .95. Hypothesized associations with the 2MWT and TUG test were observed with correlations of .72 (95% Cl,.56-.84) and -.70 (95% CI, -.82 to -.53), respectively. The ABC Scale discriminated between all groups except those based on amputation level.Conclusions: Balance confidence, as measured by the ABC Scale, is a construct that provides unique information potentially useful to clinicians who provide amputee rehabilitation. The ABC Scale is reliable, with strong support for validity. Study of the scale's responsiveness is recommended.