Cross-Cultural Validation of the Scales for Outcomes in Parkinson's Disease-Psychosocial Questionnaire (SCOPA-PS) in Four Latin American Countries

Abstract Objective To conduct a cross-national validation of the Scales for Outcomes in Parkinson's Disease-PsychoSocial questionnaire (SCOPA-PS) in four Latin American Countries. Methods Data quality (missing items), scale assumptions (item–test correlation), internal consistency (Cronbach...

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Bibliographic Details
Published in:Value in health 2009-03, Vol.12 (2), p.385-391
Main Authors: Virués-Ortega, Javier, PhD, Carod-Artal, Francisco Javier, MD, PhD, Serrano-Dueñas, Marcos, MD, Ruiz-Galeano, Gabriela, MD, Meza-Rojas, Gloria, MD, Velázquez, Carolina, MD, Micheli, Federico, MD, Martínez-Martín, Pablo, MD, PhD
Format: Article
Language:English
Subjects:
Adaptation, Psychological
Aged
Anxiety
Anxiety-Depression
CISI-PD
Cross-Cultural Comparison
Cultural Competency
Cultural Diversity
Depression
Factor Analysis, Statistical
Female
Health status
health-related quality of life
Humans
Internal Medicine
Internationality
Language
Male
Middle Aged
Parkinson Disease - drug therapy
Parkinson Disease - psychology
Parkinson's disease
PDQ-39
Psychometrics
Quality of Life
Regression Analysis
Reproducibility of Results
SCOPA-PS
Severity
Severity of Illness Index
Sickness Impact Profile
South America
Stress, Psychological - etiology
Surveys and Questionnaires
Treatment Outcome
Validation
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Summary:Abstract Objective To conduct a cross-national validation of the Scales for Outcomes in Parkinson's Disease-PsychoSocial questionnaire (SCOPA-PS) in four Latin American Countries. Methods Data quality (missing items), scale assumptions (item–test correlation), internal consistency (Cronbach's alpha, item homogeneity), factor structure, content validity, and precision (standard error of measurement, SEM) of the scale were explored, as was convergent validity with motor symptoms (Clinical Impression of Severity Index [CISI-PD], Scales for Outcomes in Parkinson's Disease-Motor Scale), emotional status (Hospital Anxiety and Depression Scale) and health-related quality of life (Parkinson Disease Questionnaire-39). Known-groups validity was studied by category of severity, based on Hoehn and Yahr staging (HY), CISI-PD, and disease duration. Results Three hundred thirty-one Parkinson's disease (PD) patients with usable data participated (mean age 64.7 years; 42.3% female; mean PD duration 8.5 years; HY, 1 to 5). Data quality (missing items
ISSN:1098-3015
1524-4733
DOI:10.1111/j.1524-4733.2008.00436.x