AIMS. To evaluate the psychometric attributes of the Scales for Outcomes in Parkinson’s Disease-Psychosocial (SCOPA-PS) in Spain and to compare them with previous studies.

PATIENTS AND METHODS We performed a multi-centre, cross-sectional study of 387 patients with Parkinson’s disease (PD), 70% of whom were in Hoehn and Yahr (HY) stages 2 or 3, with a mean age of 65.8 ± 11.1 years and 8.1 ± 6 years’ progression. The following measures were applied: SCOPA-Motor, SCOPA-Cognition, modified Parkinson’s Psychosis Rating Scale, Clinical Impression of Severity Index for Parkinson’s Disease (CISI-PD), Cumulative Illness Rating Scale-Geriatrics, SCOPA-Autonomic, SCOPA-Sleep, Hospital Anxiety and Depression Scale (HADS), Fatigue and Pain Visual Analogue Scales, EQ-5D and SCOPA-PS. Acceptability, internal consistence, dimensionality, construct validity and precision of the SCOPA-PS were analysed.

RESULTS The SCOPA-PS summary index displayed no ceiling or floor effect. Internal consistence was satisfactory (alpha = 0.85; item-total correlation => 0.39). Two factors were identified (53.5% of the variance). The SCOPA-PS was highly correlated (rS => 0.5) with the HADS, SCOPA-Motor, SCOPA-Automatic and EQ-5D index, and moderately so (rS = 0.35-0.49) with CISI-PD, fatigue and HY. The SCOPA-PS discriminated significantly between patients grouped according to HY stages, levels of severity of the CISI-PD, age groups and length of time with PD. The standard error of the measure was 7.24 ± 18.7. As a whole, these findings are in agreement with previous studies.

CONCLUSIONS The SCOPA-PS is a scale with a satisfactory degree of acceptability, and it is consistent, valid and precise for evaluating the psychosocial impact of PD.

Objetivos Evaluar los atributos psicométricos de la Scales for Outcomes in Parkinson’s Disease-Psychosocial (SCOPA-PS) en España, y compararlos con los estudios previos.

Pacientes y métodos Estudio multicéntrico y transversal sobre 387 pacientes con enfermedad de Parkinson (EP), el 70% en estadios Hoehn y Yahr (HY) 2 o 3, con edad media 65,8 ± 11,1 años y 8,1 ± 6 años de evoluación. Se aplicaron las siguientes medidas: SCOPA-Motor, SCOPA-Cognición, Parkinson’s Psychosis Rating Scale modificada, índice de impresión clínica de gravedad (CISI-PD), Cumulative Illness Rating Scale-Geriatrics, SCOPA-Autonómica, SCOPA-Sueño, escala hospitalaria de ansiedad y depresión (HADS), escalas visuales analógicas de dolor y fatiga, EQ-5D y SCOPA-PS. Se analizaron la aceptabilidad, consistencia interna, dimensionalidad, validez de constructo y precisión de la SCOPA-PS.

Resultados El índice sumarial de la SCOPA-PS no mostró efecto suelo o techo. La consistencia interna fue satisfactoria (alfa = 0,85; correlación ítem-total => 0,39). Se identificaron dos factores (un 53,5% de la varianza). La SCOPA-PS mostró una alta correlación (r_S => 0,50) con el índice EQ-5D, HADS, SCOPA-Motor y SCOPA-Autonómica, y moderada (r_S = 0,35-0,49) con CISI-PD, fatiga y HY. La SCOPA-PS discriminó significativamente entre pacientes agrupados por estadios HY, niveles de gravedad del CISI-PD, grupos de edad y de duración de la EP. El error estándar de la medida resultó 7,24 ± 18,7. En conjunto, estos hallazgos concuerdan con estudios previos.

Conclusión La SCOPA-PS es una escala con aceptabilidad satisfactoria, consistente, válida y precisa para evaluar el impacto psicosocial de la EP.