Reliability and Validity of 39-Item Parkinson's Disease Questionnaire and Parkinson's Disease Quality of Life Questionnaire
- PMID: 28865504
- DOI: 10.20344/amp.8202
Reliability and Validity of 39-Item Parkinson's Disease Questionnaire and Parkinson's Disease Quality of Life Questionnaire
Abstract
Introduction: Parkinson's disease has a significant impact in quality of life, which can be assessed with 39-item Parkinson's Disease Questionnaire and Parkinson's Disease Quality of Life Questionnaire. This study aimed to evaluate the reliability and validity of these scales in Portuguese patients.
Material and methods: Reliability was assessed through internal consistency (Cronbach's alpha) and reproducibility (intraclass correlation coefficient). Regarding construct validity, we performed one-way analysis of variance across different groups according to modified Hoehn and Yahr scale. For criterion validity, we compared both scales with each other and with the Short Form 36-item Health Survey.
Results: In a total of 100 patients with Parkinson's disease, Cronbach's alpha ranged for 39-item Parkinson's Disease Questionnaire between 0.66 - 0.98, and for Parkinson's Disease Quality of Life Questionnaire, between 0.78 - 0.98. Intraclass correlation coefficient for 39-item Parkinson's Disease Questionnaire ranged between 0.49 - 0.96, and for Parkinson's Disease Quality of Life Questionnaire, ranged between 0.65 - 0.96. Both scales showed, in general, capacity to discriminate differences among patients in the different stages of disease. The scales presented moderate to strong magnitude correlations with some Short Form 36-item Health Survey domains.
Discussion: Cronbach's alpha coefficients for most domains were satisfactory. Overall, it has been demonstrated good reproducibility, as well as construct and criterion validity.
Conclusion: The Portuguese versions of both scales showed to be valid and reliable.
Introdução: A doença de Parkinson tem um impacto significativo na qualidade de vida, podendo ser medido através do Questionário de Doença de Parkinson-39 e do Questionário de Qualidade de Vida na Doença de Parkinson. O objectivo deste estudo foi avaliar a fiabilidade e validade destas escalas em doentes portugueses. Material e Métodos: A fiabilidade foi avaliada através da consistência interna (alfa de Cronbach) e reprodutibilidade (coeficiente de correlação intraclasse). Relativamente à validade de construção, realizou-se uma análise de variância entre diferentes grupos, de acordo com a escala modificada Hoehn and Yahr. Para a validade de critério comparam-se ambas as escalas entre si e com o Short Form 36-item Health Survey. Resultados: Num total de 100 doentes com doença de Parkinson, o alfa de Cronbach variou para o Questionário de Doença de Parkinson-39 entre 0,66 – 0,98, e para o Questionário de Qualidade de Vida na Doença de Parkinson, entre 0,78 – 0,98. O coeficiente de correlação intraclasse para o Questionário de Doença de Parkinson-39 variou entre 0,49 – 0,96, e para o Questionário de Qualidade de Vida na Doença de Parkinson, variou entre 0,65 – 0,96. Ambas as escalas demonstraram, em geral, capacidade de discriminação entre doentes em diferentes estadios da doença. As escalas apresentaram correlações de magnitude moderada a forte com alguns domínios do Short Form 36-item Health Survey. Discussão: Os coeficientes do alfa de Cronbach foram satisfatórios para a maioria dos domínios. No geral, demonstrou-se boa reprodutibilidade, assim como validade de construção e critério. Conclusão: As versões portuguesas de ambas as escalas demonstraram ser fiáveis e válidas.
Keywords: Parkinson Disease; Quality of Life; Surveys and Questionnaires.
Similar articles
-
Reliability and validity of the Turkish version of the 39-item Parkinson Disease Questionnaire.Ideggyogy Sz. 2023 May 30;76(5-6):181-188. doi: 10.18071/isz.76.0181. Ideggyogy Sz. 2023. PMID: 37294025 English.
-
Cross-cultural validation of the Scales for Outcomes in Parkinson's Disease-Psychosocial questionnaire (SCOPA-PS) in four Latin American countries.Value Health. 2009 Mar-Apr;12(2):385-91. doi: 10.1111/j.1524-4733.2008.00436.x. Epub 2008 Jul 24. Value Health. 2009. PMID: 18657094
-
Validation of the Korean version of the 39-Item Parkinson's Disease Questionnaire (PDQ-39).Asian Nurs Res (Korean Soc Nurs Sci). 2014 Mar;8(1):67-74. doi: 10.1016/j.anr.2014.02.004. Epub 2014 Mar 6. Asian Nurs Res (Korean Soc Nurs Sci). 2014. PMID: 25030495
-
Health-related quality-of-life scales in Parkinson's disease: critique and recommendations.Mov Disord. 2011 Nov;26(13):2371-80. doi: 10.1002/mds.23834. Epub 2011 Jul 6. Mov Disord. 2011. PMID: 21735480 Review.
-
Neuro-QoL health-related quality of life measurement system: Validation in Parkinson's disease.Mov Disord. 2016 May;31(5):725-33. doi: 10.1002/mds.26546. Epub 2016 Feb 26. Mov Disord. 2016. PMID: 26919664 Review.
Cited by
-
Lisbon Intensive Falls Trampoline Training (LIFTT) Program for people with Parkinson's for balance, gait, and falls: study protocol for a randomized controlled trial.Trials. 2023 Feb 8;24(1):101. doi: 10.1186/s13063-023-07131-4. Trials. 2023. PMID: 36755331 Free PMC article.
-
Parkinson's Disease, Periodontitis and Patient-Related Outcomes: A Cross-Sectional Study.Medicina (Kaunas). 2020 Jul 30;56(8):383. doi: 10.3390/medicina56080383. Medicina (Kaunas). 2020. PMID: 32751544 Free PMC article.
-
Is PDQ-39 a reliable measure of quality of life of patients at advanced stages of Parkinson's disease considered for Deep Brain Stimulation.Heliyon. 2024 May 16;10(10):e31325. doi: 10.1016/j.heliyon.2024.e31325. eCollection 2024 May 30. Heliyon. 2024. PMID: 38813175 Free PMC article.
-
Study protocol for a single-blind randomised controlled trial to evaluate the clinical effects of an Integrated Qigong exercise intervention on freezing of gait in Parkinson's disease.BMJ Open. 2019 Sep 12;9(9):e028869. doi: 10.1136/bmjopen-2018-028869. BMJ Open. 2019. PMID: 31515419 Free PMC article.
-
Comparison of Wuqinxi Qigong with Stretching on Single- and Dual-Task Gait, Motor Symptoms and Quality of Life in Parkinson's Disease: A Preliminary Randomized Control Study.Int J Environ Res Public Health. 2022 Jun 30;19(13):8042. doi: 10.3390/ijerph19138042. Int J Environ Res Public Health. 2022. PMID: 35805699 Free PMC article. Clinical Trial.
Publication types
MeSH terms
LinkOut - more resources
Full Text Sources
Other Literature Sources
Medical
