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: | , , , |
|---|---|
| Другие авторы: | |
| Формат: | Journal article |
| Язык: | English |
| Опубликовано: |
Oxford University Press
2006
|
| Предметы: |