[The psychometric properties of the Spanish version of the stroke-adapted 30-item Sickness Impact Profile (SIP30-AI)].
OBJECTIVE
To assess the psychometric attributes of the stroke-adapted 30-item version of the Sickness Impact Profile, Spanish version (SA-SIP30), in stroke survivors.


METHODS
79 patients were evaluated (mean age: 68.1 years) by means of the modified Rankin Scale (m-RS), Scandinavian Stroke Scale (SSS), Barthel Index (BI), and the modified 23-item Beck-Hamilton's Depression Rating Scale (HDRS). Health-related quality of life was evaluated using the MOS-Short Form 36 (SF-36) and the SA-SIP30.


RESULTS
SA-SIP30 mean score was 36.8. SA-SIP30 floor and ceiling effects were 3.8% and 0%. Regarding SA-SIP30 categories, floor effect ranged from 15.2% (social interaction) to 49.4% (alertness behavior), whereas ceiling effect ranged from 2.5% (social interaction) to 26.6% (household management). A floor effect was observed in seven SA-SIP30 categories. The internal consistency of SA-SIP30 (Cronbach's alpha = 0.87), physical (Cronbach's alpha = 0.89) and psychosocial (Cronbach's alpha = 0.75) dimensions were satisfactory. Standard error of measurement (SEM) values for each SA-SIP30 category ranged from 15.9 (household management) to 26.3 (ambulation). SEM values for overall SA-SIP30, physical and psychosocial dimensions were 8, 10 and 17.3, respectively. Corrected item-category correlations ranged from 0.17 (item 28) to 0.83 (item 23). A significant correlation (Spearman's correlation coefficient; p < 0.0001) between SA-SIP30 scores and BI (-0.71), m-RS (0.68), SSS (-0.67), HDRS (0.52), SF-36 physical (-0.67) and mental components (-0.51) was found. SA-SIP30 mean score significantly increased as m-RS increased (discriminative validity; Kruskal-Wallis, p < 0.0001).


CONCLUSIONS
The Spanish-version of the SA-SIP30 has satisfactory internal consistency, convergent validity and discriminative validity in stroke patients.
Carod-Artal
F J
FJ
Servicio de Neurología, Hospital Sarah, Red Sarah de Hospitales de Rehabilitacion, Brasilia DF, Brasil. javier@sarah.br
González-Gutiérrez
J L
JL
Egido-Herrero
J A
JA
Varela de Seijas
E
E
D000368:Aged; D000369:Aged, 80 and over; D003072:Cognition Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D015331:Cohort Studies; D006801:Humans; D007398:Interpersonal Relations; D007802:Language; D008875:Middle Aged; D019964:Mood Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D009069:Movement Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D018434:Sickness Impact Profile; D013030:Spain; D020521:Stroke / Q000145:classification / Q000453:epidemiology / Q000523:psychology*