Translation, Cross-Cultural Adaptation, and Validation of the Parkinson's Disease Quality of Life Questionnaire (PDQL), the “PDQL-BR”, into Brazilian Portuguese | Zendy

Marcos Campos | Zendy; Carlos Henrique Alves de Rezende | Zendy; Virgilio da Costa Farnese | Zendy; Carlos Henrique Martins Silva | Zendy; Nívea Macedo de Oliveira Morales | Zendy; Rogério de Melo Costa Pinto | Zendy

Open Access

Translation, Cross-Cultural Adaptation, and Validation of the Parkinson's Disease Quality of Life Questionnaire (PDQL), the “PDQL-BR”, into Brazilian Portuguese

Author(s) -

Marcos Campos,

Carlos Henrique Alves de Rezende,

Virgilio da Costa Farnese,

Carlos Henrique Martins Silva,

Nívea Macedo de Oliveira Morales,

Rogério de Melo Costa Pinto

Publication year - 2011

Publication title -

isrn neurology

Language(s) - English

Resource type - Journals

eISSN - 2090-5513

pISSN - 2090-5505

DOI - 10.5402/2011/954787

Subject(s) - cronbach's alpha , brazilian portuguese , reliability (semiconductor) , ceiling effect , portuguese , scale (ratio) , convergent validity , quality of life (healthcare) , psychology , internal consistency , psychometrics , clinical psychology , medicine , geography , cartography , pathology , linguistics , philosophy , power (physics) , physics , alternative medicine , quantum mechanics , psychotherapist

Translate, culturally adapt, and validate the “Parkinson's Disease Quality of Life” (PDQL) BR, into Brazilian Portuguese. Fifty-two patients answered the PDQL-BR. Twenty-one patients answered the PDQL-BR again 14 days later. The UPDRS and HY scale was applied. Validation was evaluated using psychometric properties, checking the quality of the data, reliability, and validity. Quality of the data was evaluated based on occurrence of ceiling and floor effects. Reliability was evaluated based on: internal consistency of an item, homogeneity, and reproducibility. Validation was checked through the evaluation of convergent and discriminatory validation. There was no ceiling and floor effect. When evaluating reliability, items 20, 30, and 37 showed correlation of 0.34, 0.26, and 0.37, respectively, to your scale; the other items was higher than 0.4. The alpha Cronbach coefficient was higher than 0.7 for most domains. There was good reproducibility. There were no meaningful changes in the PDQL-BR translation and cross-cultural adaptation.

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