We have located links that may give you full text access.
ENGLISH ABSTRACT
JOURNAL ARTICLE
MULTICENTER STUDY
RESEARCH SUPPORT, NON-U.S. GOV'T
[Psychometric attributes of Scales for Outcomes in Parkinson's Disease-Cognition (SCOPA-Cog), Castilian language].
Revista de Neurologia 2008 October 2
AIM: To test the psychometric attributes of the Scales for Outcomes in Parkinson's Disease-Cognition (SCOPA-Cog), in Castilian language.
PATIENTS AND METHODS: It is a multicenter, cross-sectional study carried out on 387 Parkinson's disease (PD) patients. They were 70% in Hoehn and Yahr stages 2 or 3; their mean age was 65,8 years and they underwent the disease for 8,1 years. Rater-based -SCOPA-Motor, modified Parkinson's Psychosis Rating Scale, Clinical Impression of Severity Index for PD (CISI-PD), Cumulative Illness Rating Scale-Geriatrics- and self-administered -SCOPA-Autonomic, SCOPA-Sleep, SCOPA-Psychosocial, Hospital Anxiety and Depression Scale, EuroQoL- assessments were applied. For SCOPA-Cog, the following psychometric attributes were analysed: acceptability, internal consistency, dimensionality, construct validity, and precision. A cut-off point for dementia and SCOPA-Cog score's predictors were explored.
RESULTS: SCOPA-Cog was free from floor and ceiling effect. The internal consistency was satisfactory (alpha = 0,83) and the item-total correlation resulted equal or upper than 0,45. Two factors were identified (52% of variance), one of them formed by 3 out of the 4 memory-related items. The correlation with other measures was weak (rS < 0,35), except for the CISI-PD's item 'cognitive state' (rS = 0,51). SCOPA-Cog scored significantly different for Hoehn and Yahr stages and for patients grouped by age, age at onset of PD, and education. The standard error of measurement was 3,02. A cut-off point 19/20 reached 76% sensitivity and specificity for dementia. Age and age at onset of PD resulted the strongest predictors.
CONCLUSION: SCOPA-Cog is a consistent, valid, and precise measure for assessment of the cognitive disorder in PD.
PATIENTS AND METHODS: It is a multicenter, cross-sectional study carried out on 387 Parkinson's disease (PD) patients. They were 70% in Hoehn and Yahr stages 2 or 3; their mean age was 65,8 years and they underwent the disease for 8,1 years. Rater-based -SCOPA-Motor, modified Parkinson's Psychosis Rating Scale, Clinical Impression of Severity Index for PD (CISI-PD), Cumulative Illness Rating Scale-Geriatrics- and self-administered -SCOPA-Autonomic, SCOPA-Sleep, SCOPA-Psychosocial, Hospital Anxiety and Depression Scale, EuroQoL- assessments were applied. For SCOPA-Cog, the following psychometric attributes were analysed: acceptability, internal consistency, dimensionality, construct validity, and precision. A cut-off point for dementia and SCOPA-Cog score's predictors were explored.
RESULTS: SCOPA-Cog was free from floor and ceiling effect. The internal consistency was satisfactory (alpha = 0,83) and the item-total correlation resulted equal or upper than 0,45. Two factors were identified (52% of variance), one of them formed by 3 out of the 4 memory-related items. The correlation with other measures was weak (rS < 0,35), except for the CISI-PD's item 'cognitive state' (rS = 0,51). SCOPA-Cog scored significantly different for Hoehn and Yahr stages and for patients grouped by age, age at onset of PD, and education. The standard error of measurement was 3,02. A cut-off point 19/20 reached 76% sensitivity and specificity for dementia. Age and age at onset of PD resulted the strongest predictors.
CONCLUSION: SCOPA-Cog is a consistent, valid, and precise measure for assessment of the cognitive disorder in PD.
Full text links
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app