Assessing health-related quality of life with the SCOPA-PS in French individuals with Parkinson's disease having undergone DBS-STN: A validation study - 20/05/16
, M. Storme c, P. Martínez-Martín d, M. Pichlak a, J.-M. Gurruchaga a, S. Palfi a, G. Fénelon eBienvenue sur EM-consulte, la référence des professionnels de santé.
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Abstract |
Introduction |
The aims of this study were to validate the French version of the SCales for Outcomes in Parkinson's Disease-PsychoSocial (SCOPA-PS) in individuals with Parkinson's disease (PD) who underwent deep brain stimulation of the subthalamic nucleus (DBS-STN), to confirm the unifactorial structure of this questionnaire, and to establish its psychometric properties.
Methods |
Routinely used psychological questionnaires (BDI-II, STAI-Y, PDQ-39, UPDRS III) and the SCOPA-PS were used for a cross-sectional observational study of 154 PD patients. SCOPA-PS acceptability, scaling assumption, reliability, ordinal confirmatory factor analysis and validity were assessed.
Results |
The ICC for two-week test-retest reliability was 0.88. SEM was 8.42. In confirmatory factor analysis, the one-factor model showed an acceptable fit to the data (Chi2/df=2.130; CFI=0.976; RMSEA=0.086). No floor or ceiling effects were observed. Skewness was 0.33. Item-total correlation coefficients ranged from 0.47 to 0.71. Cronbach's alpha was 0.86. SCOPA-PS SI correlated with PDQ-39 SI (rs=0.83) and with state-anxiety and depression (rs=0.56 and 0.69 respectively). The SCOPA-PS SI was higher in more depressed patients and in those with the most severe PD motor symptoms.
Conclusion and discussion |
SCOPA-PS French version is a one-factor scale with satisfactory psychometric properties consistent with other language versions. This short scale can be used to evaluate the psychosocial component of QoL in PD patients treated with DBS-STN.
Le texte complet de cet article est disponible en PDF.Keywords : Parkinson's disease, Quality of life, SCOPA-psychosocial, Unifactorial structure, French version
Abbreviations : BDI-II, CFA, CFI, DBS-STN, EFA, HRQoL, ICC, PD, PDQ-39, QoL, RMSEA, SCOPA-PS, SEM, SI, STAI-Y, UPDRS
Plan
Vol 172 - N° 4-5
P. 281-288 - avril 2016 Retour au numéro
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