The stroke impact scale version 2.0 - Evaluation of reliability, validity, and sensitivity to change
The stroke impact scale version 2.0 - Evaluation of reliability, validity, and sensitivity to change
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DOI：
10.1161/01.str.30.10.2131
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发表时间：
1999-10-01
期刊：
影响因子：
8.3
通讯作者：
Laster, LJ
中科院分区：
文献类型：
--
作者：
Duncan, PW;Wallace, D;Laster, LJ
背景和目的：为了对临床研究有用，结果测量必须是可行的，并且具有良好的心理测量属性，包括信度、效度和对变化的敏感性。本研究探讨脑卒中冲击量表（SIS） 2.0版的心理测量特性。方法：SIS 2.0版是一种自我报告量表，包括64个项目，评估8个领域（力量、手功能、ADL/IADL、移动性、沟通、情感、记忆和思维、参与）。轻度和中度卒中患者分别在卒中后1个月（n = 91）、3个月（n = 80）和6个月（n = 69）完成SIS。25名受试者在3个月或6个月的测试后1周重复使用SIS。我们评估了内部一致性和重测信度。通过将SIS与现有的卒中测量方法进行比较，并通过比较不同Rankin量表水平上SIS得分的差异，来检验SIS域的有效性。使用混合模型程序来评估SIS域分数对变化的反应性。结果：8个域均达到或接近同一患者跨时间比较的0.9 α -系数标准。除情绪域（0.57）外，SIS域重测信度的类内相关系数为0.70 ~ 0.92。当将这些域与已建立的结果测量值进行比较时，相关性从中等到强（0.44至0.84）。参与域与SF-36社会角色功能的相关性最强。SIS域分数在4个兰金水平上有区别。由于正在进行的恢复，SIS域对变化具有响应性。对变化的反应受到中风严重程度和中风后时间的影响。结论：这种新的卒中特异性结果测量方法是可靠、有效且对变化敏感的。我们对测量的效用持乐观态度。需要更多的研究在更大、更异质性的人群中评估SIS，并评估代理反应对最严重受损患者的可行性和有效性。
Background and Purpose-To be useful for clinical research, an outcome measure must be feasible to administer and have sound psychometric attributes, including reliability, validity, and sensitivity to change. This study characterizes the psychometric properties of the Stroke Impact Scale (SIS) Version 2.0.Methods-Version 2.0 of the SIS is a self-report measure that includes 64 items and assesses 8 domains (strength, hand function, ADL/IADL, mobility, communication, emotion, memory and thinking, and participation). Subjects with mild and moderate strokes completed the SIS at 1 month (n = 91), at 3 months (n = 80), and at 6 months after stroke (n = 69). Twenty-five subjects had a replicate administration of the SIS 1 week after the 3-month or 6-month test. We evaluated internal consistency and test-retest reliability. The validity of the SIS domains was examined by comparing the SIS to existing stroke measures and by comparing differences in SIS scores across Rankin scale levels. The mixed model procedure was used to evaluate responsiveness of the SIS domain scores to change.Results-Each of the 8 domains met or approached the standard of 0.9 alpha-coefficient for comparing the same patients across time. The intraclass correlation coefficients for test-retest reliability of SIS domains ranged from 0.70 to 0.92, except for the emotion domain (0.57). When the domains were compared with established outcome measures, the correlations were moderate to strong (0.44 to 0.84). The participation domain was most strongly associated with SF-36 social role function. SIS domain scores discriminated across 4 Rankin levels. SIS domains are responsive to change due to ongoing recovery. Responsiveness to change is affected by stroke severity and time since stroke.Conclusions-This new, stroke-specific outcome measure is reliable, valid, and sensitive to change. We are optimistic about the utility of measure. More studies are required to evaluate the SIS in larger and more heterogeneous populations and to evaluate the feasibility and validity of proxy responses for the most severely impaired patients.