Comparison of three instruments to assess changes of motor impairment in acute hemispheric stroke: the Stroke Impairment Assessment Set (SIAS), the National Institute of Health Stroke Scale (NIHSS) and the Canadian Neurological Scale (CNS).
OBJECTIVE
The purpose was to compare the performance of three representative instruments to measure changes of motor recovery with acute hemispheric stroke.


METHODS
In 41 consecutive patients with acute hemispheric infarction, motor recovery was assessed within 3 days of onset and then every 2 weeks until the 12th week with the Stroke Impairment Assessment Set (SIAS), the National Institutes of Health stroke scale (NIHSS) and the Canadian Neurological Scale (CNS). We analyzed the relationships among the corresponding subscales of the three instruments with the Spearman's rank correlation method, and compared their responsiveness by plotting the temporal profiles of scores of each instrument and by testing the significance of changes over time with the Friedman test.


RESULTS
High correlations were observed among the three instruments at each examination point. However, the SIAS scores were more widely dispersed at the same NIHSS and CNS scores. Friedman test revealed that the scores changed significantly during the observation period with the SIAS and the CNS but not with the NIHSS. The changes were detected later with the CNS than with the SIAS.


CONCLUSIONS
Although the assessment results with the three instruments were highly inter-correlated, the SIAS performed better with respect to responsiveness to changes. Implication for Rehabilitation When providing rehabilitation services to patients with stroke, it is important to document objectively the level of their impairment from the acute stage and during the entire course of rehabilitation with standardized instrument, and to predict their functional outcomes as early and accurately as possible. This study therefore compared three representative instruments with established psychometric properties, the SIAS, the NIHSS and the CNS, with respect to their ability to document motor impairment and their responsiveness to recovery in patients with acute hemispheric stroke.
Department of Liberal Arts and Human Development, Kanagawa University of Human Services , Kanagawa , Japan .
Masaru
M
Seki
Kimitaka
K
Hase
Hidetoshi
H
Takahashi
Meigen
M
Liu
D004185:Disability Evaluation; D005260:Female; D006429:Hemiplegia / Q000503:physiopathology / Q000534:rehabilitation*; D006801:Humans; D035002:Lower Extremity / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D019957:Motor Skills Disorders / Q000503:physiopathology / Q000534:rehabilitation*; D011594:Psychometrics; D020127:Recovery of Function / Q000502:physiology; D020521:Stroke / Q000503:physiopathology; D000071939:Stroke Rehabilitation; D034941:Upper Extremity / Q000503:physiopathology
Hemiplegia; measurement; motor recovery; stroke