Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jns.2007.01.072
Title: Validation of PDQ-8 as an independent instrument in English and Chinese
Authors: Tan, L.C.S.
Lau, P.-N.
Au, W.-L.
Luo, N. 
Keywords: Parkinson's disease
PDQ-39
PDQ-8
Quality of life
Singapore
Issue Date: 2007
Source: Tan, L.C.S., Lau, P.-N., Au, W.-L., Luo, N. (2007). Validation of PDQ-8 as an independent instrument in English and Chinese. Journal of the Neurological Sciences 255 (1-2) : 77-80. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jns.2007.01.072
Abstract: Previous validation studies on the PDQ-8, a brief disease-specific quality of life instrument, were performed with the PDQ-8 nested in the original PDQ-39. Such an approach may influence patient responses and the psychometric properties of the PDQ-8. We therefore undertook this study to validate the PDQ-8 when administered independently in English and Chinese and found good item-to-scale correlations (correlation coefficient: 0.44-0.68) and internal consistency (Cronbach's alpha: 0.81, 0.87). Factor analyses yielded a component on which all 8 questions were substantially loaded (loading range: 0.55-0.77). Scree plots also showed the one-factor solution thereby validating the PDQ-8 summary index. Construct validation against the Hoehn and Yahr stage and UPDRS motor scores showed significant correlations between higher PDQ-8 summary index and increased disease severity in both English and Chinese versions. Our results show the PDQ-8 to be a valid and reliable disease-specific HRQoL instrument for PD when used independently of the PDQ-39. © 2007 Elsevier B.V. All rights reserved.
Source Title: Journal of the Neurological Sciences
URI: http://scholarbank.nus.edu.sg/handle/10635/27529
ISSN: 0022510X
DOI: 10.1016/j.jns.2007.01.072
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

20
checked on Dec 13, 2017

WEB OF SCIENCETM
Citations

19
checked on Dec 13, 2017

Page view(s)

303
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.