Psychometric comparisons of the Stroke Impact Scale 3.0 and Stroke-Specific Quality of Life Scale.
OBJECTIVE
This study compared the responsiveness and criterion-related validity of the Stroke Impact Scale (SIS) and Stroke-Specific Quality of Life Scale (SS-QOL) for patients after stroke rehabilitation.


METHODS
The SIS and SS-QOL, along with five criterion measures-the Fugl-Meyer Assessment, the Motor Activity Log, the Functional Independence Measure, the Frenchay Activities Index, and the Nottingham Extended Activities of Daily Living Scale-were administered to 74 patients with stroke before and after a 3-week intervention. Responsiveness was examined using the Wilcoxon signed rank test and standardized response mean (SRM). Criterion-related validity was investigated using the Spearman correlation coefficient (rho).


RESULTS
Whereas the SS-QOL subscales were nonresponsive to changes, the SIS hand function showed medium responsiveness (SRM = .52, Wilcoxon Z = 4.24, P < .05). Responsiveness of the SIS total also was significantly larger than that of the SS-QOL total (SRM difference, .36; 95% confidence interval, .02-.71). Criterion validity of the SIS hand function was good (rho = .51-.68; P < .01), but that of the SS-QOL was only fair (rho = .25-.31; P < .05).


CONCLUSIONS
Because the SIS had better overall responsiveness and the SIS hand function showed medium responsiveness and good criterion validity, the SIS appears to be more suited for assessing changes after stroke rehabilitation.
Lin
Keh-Chung
KC
The School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan. kehchunglin@ntu.edu.tw
Fu
Tiffany
T
Wu
Ching-Yi
CY
Hsieh
Yu-Wei
YW
Chen
Chia-Ling
CL
Lee
Pei-Chin
PC
D000203:Activities of Daily Living; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D051346:Mobility Limitation; D011594:Psychometrics / Q000295:instrumentation*; D019057:Quality-Adjusted Life Years; D015203:Reproducibility of Results; D018434:Sickness Impact Profile; D020521:Stroke / Q000150:complications / Q000523:psychology*