Article

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 (Chi(2)/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.
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Langue : ANGLAIS