Revised SCOPA-Diary Card for Parkinson's Disease
Author Information
Author(s): Rendas-Baum Regina, Buck Philip O, White Michelle K, Castelli-Haley Jane
Primary Institution: QualityMetric Inc.
Hypothesis
The factorial structure of the Revised SCOPA-DC would be best represented by a 2-factor structure, corresponding to motor and non-motor symptom domains.
Conclusion
The Revised SCOPA-DC is a valid and reliable instrument for measuring the impact of Parkinson's disease symptoms and the severity of off-time.
Supporting Evidence
- The Revised SCOPA-DC included several format changes and the addition of non-motor symptoms based on patient input.
- Confirmatory factor analysis indicated that the Revised SCOPA-DC was best represented by a three-factor structure.
- Scores on the Revised SCOPA-DC were lower among patients who reported experiencing off-time compared to those without off-time.
Takeaway
This study created a new diary card to help people with Parkinson's disease track their symptoms better, especially the ones that aren't about movement.
Methodology
A convenience sample of 101 PD patients was surveyed using the Revised SCOPA-DC, which was developed based on focus group input and validated through confirmatory factor analysis.
Potential Biases
Potential bias from self-reported PD diagnosis and online recruitment methods.
Limitations
Online recruitment may have introduced bias, self-reported diagnosis could lead to misclassification, and a standardized scale of non-motor symptoms was not used.
Participant Demographics
Participants were mostly white (88.1%), male (50.5%), and had been diagnosed with PD for an average of 7.4 years.
Statistical Information
P-Value
p<0.05
Confidence Interval
(0.00, 0.10)
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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