Determination of the longitudinal validity and minimally important difference of the 8-item Parkinson's disease questionnaire (PDQ-8)

Movement Disorders

Volumn 24, Issue 2, 2009, Pages 183-187

  Luo, Nan ^a   Tan, Louis C S ^b   Zhao, Yingjiao ^a   Lau, Puay Ngoh ^b   Au, Wing Lok ^b   Li, Shu Chuen ^c  

^a NATIONAL UNIVERSITY OF SINGAPORE   (Singapore)

^b NATIONAL NEUROSCIENCE INSTITUTE   (Singapore)

^c UNIVERSITY OF NEWCASTLE   (Australia)

Author keywords

Minimally important difference; Parkinson's disease; PDQ 8; Responsiveness

Indexed keywords

8 ITEM PARKINSON DISEASE QUESTIONNAIRE; ARTICLE; CLINICAL EFFECTIVENESS; CONTROLLED STUDY; DISEASE SEVERITY; EFFECT SIZE; LONGITUDINAL STUDY; PARKINSON DISEASE; PRIORITY JOURNAL; PSYCHOLOGICAL RATING SCALE; QUALITY OF LIFE; QUESTIONNAIRE; SAMPLING; SINGAPORE; TEST RETEST RELIABILITY; VALIDATION STUDY;

CHINA; FEMALE; HUMANS; INDIA; LANGUAGE; MALAYSIA; MALE; MIDDLE AGED; PARKINSON DISEASE; QUALITY OF LIFE; QUESTIONNAIRES; REPRODUCIBILITY OF RESULTS; SEVERITY OF ILLNESS INDEX; SINGAPORE;

EID: 61649084998     PISSN: 08853185     EISSN: 15318257     Source Type: Journal    
DOI: 10.1002/mds.22240     Document Type: Article

References (32)

1. Kuopio AM, Marttila RJ, Helenius H, Toivonen M, Rinne UK. The quality of life in Parkinson's disease. Mov Disord 2000;15: 216-223.
2. Schrag A, Jahanshahi M, Quinn N. What contributes to quality of life in patients with Parkinson's disease? J Neurol Neurosurg Psychiatry 2000;69:308-312.
3. Hobson P, Holden A, Meara J. Measuring the impact of Parkinson's disease with the Parkinson's Disease quality of life questionnaire. Age Ageing 1999;28:341-346.
4. Peto V. Jenkinson C. Fitzpatrick R. Greenhall R. The development and validation of a short measure of functioning and well being for individuals with Parkinson's disease. Qual Life Res 1995;4:241-248.
5. Marinus J, Ramaker C, van Hilten JJ, Stiggelbout AM. Health related quality of life in Parkinson's disease: a systematic review of disease specific instruments. J Neurol Neurosurg Psychiatry 2002;72:241-248.
6. Jenkinson C, Fitzpatrick R, Peto V, Greenhall R, Hyman N. The PDQ-8: development and validation of a short-form Parkinson's disease questionnaire. Psychol Health 1997;12:805-814.
7. Tan LCS, Luo N, Nazri M, Li SC, Thumboo J. Validity and reliability of the PDQ-39 and PDQ-8 in English-speaking patients in Singapore. Parkinsonism Relat Disord 2004;10:493-499.
8. Katsarou Z, Bostantjopoulo S, Peto V, Kafantari A, Apotolidou E, Peitsidou E. Assessing quality of life in Parkinson's disease: can a short-form questionnaire be useful? Mov Disord 2004;19: 308-312.
9. Onofrj M, Thomas A, Vingerhoets F, et al. Combining entacapone with levodopa/DDCI improves clinical status and quality of life in Parkinson's disease (PD) patients experiencing wearing-off regardless of the dosing frequency: results of a large multicentre open-label study. J Neural Transm 2004;111:1053-1063.
10. Grandas F, Hernández B; PRACTICOMT Study Group. Long-term effectiveness and quality of life improvement in entacapone-treated Parkinson's disease patients: the effects of an early therapeutic intervention. Eur J Neurol 2007;14:282-289.
11. Martinez-Martin P, Benito-León J, Alonso F, Catalán MJ, Pondal M, Zamarbide I. Health-related quality of life evaluation by proxy in Parkinson's disease: approach using PDQ-8 and Euro-Qol-5D. Mov Disord 2004;19:312-318.
12. Caap-Ahlgren M, Dehlin O. Sense of coherence is a sensitive measure for changes in Parkinson's disease during 1 year. Scand J Caring Sci 2004;18:154-159.
13. Martinez-Martin P, Catalan MJ, Benito-Leon J, et al. Impact of fatigue in Parkinson's disease: the fatigue impact scale for daily use (D-FIS). Qual Life Res 2006;15:597-606.
14. Luo N, Tan LCS, Li SC, Soh LK, Thumboo J. Validity and reliability of the Chinese (Singapore) version of the Parkinson's disease questionnaire (PDQ-39). Qual Life Res 2005;14:271-277.
15. Jenkinson C, Fitzpatrick R. Cross cultural evaluation of the short form 8 item Parkinson's disease questionnaire (PDQ-8): results from America, Canada, Japan, Italy and Spain. Parkinsonism Relat Disord 2006;13:22-28.
16. Tan LC, Lau PN, Au WL, Luo N. Validation of PDQ-8 as an independent instrument in English and Chinese. J Neurol Sci 2007; 255:77-80.
17. Guyatt G, Walter S, Norman G. Measuring change over time: assessing the usefulness of evaluative instruments. J Chronic Dis 1987;40:171-178.
18. Guyatt GH, Osoba D, Wu AW, Wyrwich KW, Norman GR. Clinical significance consensus meeting group. Methods to explain the clinical significance of health status measures. Mayo Clin Proc 2002;77:371-383.
19. Gelb DJ, Oliver E, Gilman S. Diagnostic criteria for Parkinson disease. Arch Neurol 1999;56:33-39.
20. Folstein MF, Folstein SE, McHugh PR. Mini-mental state. A practical method for grading the cognitive state of patients for the clinician. J Psychiatr Res 1975;12:189-198.
21. Sahadevan S, Lim PPJ, Tan NJL, Chan SP. Diagnostic performance of two mental status tests in the older Chinese: Influence of education and age on cut-off values. Int J Geriatr Psychiatry 2000;15:234-241.
22. Cohen J. Statistical power analysis for the behavioral sciences, 2nd ed. Hillsdale: Lawrence Earlbaum Associates; 1988.
23. Fayers PM, Machin D. Quality of life: assessment, analysis and interpretation. Chichester: Wiley; 2000.
24. Deyo RA, Diehr P, Patrick DL. Reproducibility and responsiveness of health status measures. Statistics and strategies for evaluation. Control Clin Trials 1991;12:142S-158S.
25. Guyatt G, Walter S, Norman G. Measuring change over time: assessing the usefulness of evaluative instruments. J Chronic Dis 1987;40:171-178.
26. Hays RD, Anderson RT, Revicki D. Assessing reliability and validity of measurement in clinical trials. In: Staquet MJ, Hays RD, Fayers PM, editors. Quality of life assessment in clinical trials methods and practice. Oxford: Oxford University Press; 1998. p 169-182.
27. Hays RD, Farivar SS, Liu H. Approaches and recommendations for estimating minimally important differences for health-related quality of life measures. COPD 2005;2:63-67.
28. Revicki D, Hays RD, Cella D, Sloan J. Recommended methods for determining responsiveness and minimally important differences for patient-reported outcomes. J Clin Epidemiol 2008;61: 102-109.
29. Peto V, Jenkinson C, Fitzpatrick R. Determining minimally important differences for the PDQ-39 Parkinson's disease questionnaire. Age Ageing 2001;30:299-302.
30. de Vet HC, Terwee CB, Ostelo RW, Beckerman H, Knol DL, Bouter LM. Minimal changes in health status questionnaires: distinction between minimally detectable change and minimally important change. Health Qual Life Outcomes 2006;4:54.
31. Schunemann HJ, Guyatt GH. Commentary-goodbye M(C)ID! Hello MID, where do you come from? Health Serv Res 2005;40: 593-597.
32. Wyrwich KW, Bullinger M, Aaronson N, Hays RD, Patrick DL, Symonds T; The Clinical Significance Consensus Meeting Group. Estimating clinically significant differences in quality of life outcomes. Qual Life Res 2005;14:285-295.