Open AccessThe Parkinson’s Disease Questionnaire (PDQ-39): evidence for a method of imputing missing data
Author(s) -
Crispin Jenkinson,
Catherine Heffernan,
Helen Doll,
Ray Fitzpatrick
Publication year - 2006
Publication title -
age and ageing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.014
H-Index - 143
eISSN - 1468-2834
pISSN - 0002-0729
DOI - 10.1093/ageing/afl055
Subject(s) - missing data , imputation (statistics) , medicine , statistics , data mining , computer science , mathematics
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.
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