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...
Главные авторы: | Jenkinson, C, Heffernan, C, Doll, H, Fitzpatrick, R |
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Другие авторы: | British Geriatrics Society |
Формат: | Journal article |
Язык: | English |
Опубликовано: |
Oxford University Press
2006
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Предметы: |
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