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The 39-Item Parkinson's Disease Questionnaire (PDQ-39): Is it a Unidimensional Construct?
The 39-item Parkinson's Disease Questionnaire, and particularly its summary index (PDQ-39SI) is a widely used patient-reported clinical trial endpoint. A basic assumption when summing items into a total score is that they represent a common variable. We therefore assessed the unidimensionality...
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| Main Authors: | , |
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| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado: |
SAGE Publications
2009
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| Acceso en liña: | https://ncbi.nlm.nih.gov/pmc/articles/PMC3002633/ https://ncbi.nlm.nih.gov/pubmed/21179529 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1177/1756285609103726 |
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