Psychometric properties of the Italian version of scale for outcomes in Parkinson’s disease psychiatric complications in Parkinson disease

Psychometric properties of the Italian version of scale for outcomes in Parkinson’s disease psychiatric complications in Parkinson disease

Abstract The Scales for Outcomes in Parkinson’s disease-Psychiatric Complications (SCOPA-PC) is a validated tool to score psychotic and compulsive symptoms in Parkinson’s disease (PD). We translated into Italian the SCOPA-PC and evaluated its psychometric properties and clinical correlates in differ...

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Main Authors: Sofia Cuoco, Arianna Cappiello, Immacolata Carotenuto, Maria Autuori, Rossella Bisogno, Cristiano Sorrentino, Marco Aiello, Paolo Barone, Marina Picillo
Format: Article
Language:English
Published: Nature Portfolio 2025-05-01
Series:Scientific Reports
Subjects:
Behavioral symptoms
Parkinson disease
Psychiatric symptoms
Impulsive dyscontrol
Online Access:https://doi.org/10.1038/s41598-025-03088-3
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Summary:Abstract The Scales for Outcomes in Parkinson’s disease-Psychiatric Complications (SCOPA-PC) is a validated tool to score psychotic and compulsive symptoms in Parkinson’s disease (PD). We translated into Italian the SCOPA-PC and evaluated its psychometric properties and clinical correlates in different subgroups of PD patients. The scale underwent translation, back-translation, and cognitive pretesting before being administered to a calculated sample of 135 PD patients. All patients underwent a clinical interview, motor evaluation, cognitive screening test, behavioral and functional scales. We explored SCOPA-PC feasibility, acceptability, internal consistency, convergent validity, known-groups validity, and test–retest reliability. The mean SCOPA-PC score was 1.99 ± 2.09. The internal consistency was acceptable (α = 0.631); corrected item-total correlation was > 0.45 for most items. The significant and moderate correlation of the SCOPA-PC with other tools evaluating psychiatric symptoms indicated adequate convergent validity of the scale. The factor analysis disclosed two factors, with total variance equal to 50.19%. The reliability of SCOPA-PC was high especially in cognitively preserved patients not on medications for dementia, depression, psychosis and anxiety. The SCOPA-PC is a rapid and reliable screening tool for assessing psychotic and compulsive symptoms in PD. Our data support a role for the SCOPA-PC as a screening scale in early, non-demented PD.
ISSN:2045-2322

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