Psychometric validation of the revised SCOPA-Diary Card: expanding the measurement of non-motor symptoms in Parkinson's disease.

ABSTRACT:

Background

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.

Methods

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.

Results</

SUBMITTER: Rendas-Baum R 

PROVIDER: S-EPMC3173285 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature