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The Parkinson's Disease Questionnaire (PDQ-39): evidence for a method of imputing missing data

Abstract:

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: the purpose of this article is to evaluate the Expectation Maximisation (EM) algorithm for the imputation of missing dimension scores on the 39-item PDQ-39. Methods: a postal survey of patients diagnosed w...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1093/ageing/afl055

Authors


More by this author
Institution:
University of Oxford
Division:
MSD
Department:
Nuffield Department of Population Health
Oxford college:
Harris Manchester College
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MSD
Department:
Nuffield Department of Population Health
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MSD
Department:
Nuffield Department of Population Health
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MSD
Department:
Nuffield Department of Population Health
Oxford college:
Nuffield College
Role:
Author

Contributors

Parkinson's Disease Society More from this funder
Publisher:
Oxford University Press Publisher's website
Journal:
Age and Ageing Journal website
Volume:
35
Issue:
5
Pages:
497-502
Publication date:
2006-09-01
DOI:
EISSN:
1468-2834
ISSN:
0002-0729
Language:
English
Keywords:
Subjects:
UUID:
uuid:29a9dcf8-f552-4e15-844c-184bc7708b58
Local pid:
ora:4532
Deposit date:
2010-12-01

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