The Parkinson's Disease Questionnaire (PDQ-39): evidence for a method of imputing missing data
Background: the Parkinson's Disease Questionnaire (PDQ-39) is the most widely used Parkinson's specific measure of health status. It is increasingly used in treatment trials, sometimes as a primary end-point, where any missing data can potentially cause difficulties in analyses. Objectives...
| Autors principals: | , , , |
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| Format: | Journal article |
| Idioma: | English |
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Oxford University Press
2006
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