Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease
<p>Abstract</p> <p>Background</p> <p>To identify key non-motor symptoms of Parkinson's disease (PD) to include in a daily diary assessment for off-time, revise the Scales for Outcomes of Parkinson's disease Diary Card (SCOPA-DC) to include these non-motor symp...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
BMC
2011-08-01
|
Series: | Health and Quality of Life Outcomes |
Subjects: | |
Online Access: | http://www.hqlo.com/content/9/1/69 |
id |
doaj-f9fdb3f0e065461088ff2bdb141df0ef |
---|---|
record_format |
Article |
spelling |
doaj-f9fdb3f0e065461088ff2bdb141df0ef2020-11-24T20:54:28ZengBMCHealth and Quality of Life Outcomes1477-75252011-08-01916910.1186/1477-7525-9-69Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's diseaseWhite Michelle KBuck Philip ORendas-Baum ReginaCastelli-Haley Jane<p>Abstract</p> <p>Background</p> <p>To identify key non-motor symptoms of Parkinson's disease (PD) to include in a daily diary assessment for off-time, revise the Scales for Outcomes of Parkinson's disease Diary Card (SCOPA-DC) to include these non-motor symptoms, and investigate the validity, reliability and predictive utility of the Revised SCOPA-DC in a U.S. population.</p> <p>Methods</p> <p>A convenience sample was used to recruit four focus groups of PD patients. Based on findings from focus groups, the SCOPA-DC was revised and administered to a sample of 101 PD patients. Confirmatory factor analysis was conducted to test the domain structure of the Revised SCOPA-DC. The reliability, convergent and discriminant validity, and ability to predict off-time of the Revised SCOPA-DC were then assessed.</p> <p>Results</p> <p>Based on input from PD patients, the Revised SCOPA-DC included several format changes and the addition of non-motor symptoms. The Revised SCOPA-DC was best represented by a three-factor structure: Mobility, Physical Functioning and Psychological Functioning. Correlations between the Revised SCOPA-DC and other Health-Related Quality of Life scores were supportive of convergent validity. Known-groups validity analyses indicated that scores on the Revised SCOPA-DC were lower among patients who reported experiencing off-time when compared to those without off-time. The three subscales had satisfactory predictive utility, correctly predicting off-time slightly over two-thirds of the time.</p> <p>Conclusions</p> <p>These findings provide evidence of content validity of the Revised SCOPA-DC and suggest that a three-factor structure is an appropriate model that provides reliable and valid scores to assess symptom severity among PD patients with symptom fluctuations in the U.S.</p> http://www.hqlo.com/content/9/1/69Parkinson's diseasequality of lifeSCOPAdiaryreliabilityvaliditynon-motor symptoms |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
White Michelle K Buck Philip O Rendas-Baum Regina Castelli-Haley Jane |
spellingShingle |
White Michelle K Buck Philip O Rendas-Baum Regina Castelli-Haley Jane Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease Health and Quality of Life Outcomes Parkinson's disease quality of life SCOPA diary reliability validity non-motor symptoms |
author_facet |
White Michelle K Buck Philip O Rendas-Baum Regina Castelli-Haley Jane |
author_sort |
White Michelle K |
title |
Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease |
title_short |
Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease |
title_full |
Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease |
title_fullStr |
Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease |
title_full_unstemmed |
Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in parkinson's disease |
title_sort |
psychometric validation of the revised scopa-diary card: expanding the measurement of non-motor symptoms in parkinson's disease |
publisher |
BMC |
series |
Health and Quality of Life Outcomes |
issn |
1477-7525 |
publishDate |
2011-08-01 |
description |
<p>Abstract</p> <p>Background</p> <p>To identify key non-motor symptoms of Parkinson's disease (PD) to include in a daily diary assessment for off-time, revise the Scales for Outcomes of Parkinson's disease Diary Card (SCOPA-DC) to include these non-motor symptoms, and investigate the validity, reliability and predictive utility of the Revised SCOPA-DC in a U.S. population.</p> <p>Methods</p> <p>A convenience sample was used to recruit four focus groups of PD patients. Based on findings from focus groups, the SCOPA-DC was revised and administered to a sample of 101 PD patients. Confirmatory factor analysis was conducted to test the domain structure of the Revised SCOPA-DC. The reliability, convergent and discriminant validity, and ability to predict off-time of the Revised SCOPA-DC were then assessed.</p> <p>Results</p> <p>Based on input from PD patients, the Revised SCOPA-DC included several format changes and the addition of non-motor symptoms. The Revised SCOPA-DC was best represented by a three-factor structure: Mobility, Physical Functioning and Psychological Functioning. Correlations between the Revised SCOPA-DC and other Health-Related Quality of Life scores were supportive of convergent validity. Known-groups validity analyses indicated that scores on the Revised SCOPA-DC were lower among patients who reported experiencing off-time when compared to those without off-time. The three subscales had satisfactory predictive utility, correctly predicting off-time slightly over two-thirds of the time.</p> <p>Conclusions</p> <p>These findings provide evidence of content validity of the Revised SCOPA-DC and suggest that a three-factor structure is an appropriate model that provides reliable and valid scores to assess symptom severity among PD patients with symptom fluctuations in the U.S.</p> |
topic |
Parkinson's disease quality of life SCOPA diary reliability validity non-motor symptoms |
url |
http://www.hqlo.com/content/9/1/69 |
work_keys_str_mv |
AT whitemichellek psychometricvalidationoftherevisedscopadiarycardexpandingthemeasurementofnonmotorsymptomsinparkinsonsdisease AT buckphilipo psychometricvalidationoftherevisedscopadiarycardexpandingthemeasurementofnonmotorsymptomsinparkinsonsdisease AT rendasbaumregina psychometricvalidationoftherevisedscopadiarycardexpandingthemeasurementofnonmotorsymptomsinparkinsonsdisease AT castellihaleyjane psychometricvalidationoftherevisedscopadiarycardexpandingthemeasurementofnonmotorsymptomsinparkinsonsdisease |
_version_ |
1716794463134679040 |