Adaptação cultual e validação do instrumento : "The pain disability questionnaire" / Cultural adaptation and validation of the instrument : "The pain disability questionnaire"

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Musculoskeletal disorders are a major public health problem in developed countries. They have great impact on the population due to their high prevalence and morbidity, and due to their significant potential for causing disabilities. Health- and work-related organizations and researchers have attempted to use a variety of questionnaires and scales to measure different aspects of disability due to pain. The Pain Disability Questionnaire (PDQ) assesses physical and the psychosocial aspects of disability caused by pain. The objective of the present research project was to translate and adapt "The Pain Disability Questionnaire" into Brazilian Portuguese, in order to assess its psychometric properties and to verify its usability. Methodological steps recommended by specialized publications were followed in order to ensure the quality of adaptation: translation, back-translation, synthesis, evaluation by a committee of judges, and a pretest with 30 patients. The psychometric properties were assessed by applying the questionnaire to 119 patients with chronic musculoskeletal disorders. Reliability was verified by internal consistency and test-retest stability. The validity was obtained through correlation analyses of the Pain Disability Questionnaire scores with the numerical pain scale and with the Spitzer Quality of Life Index (QLI). The validity was verified using the known-groups technique, administering the questionnaire both to a group with chronic musculoskeletal disorders and to a group with no disabilities. The instrument s usability was assessed using a five-point Likert scale, addressing time spent and facility in answering. The results indicate the instrument s reliability, with a Cronbach s Alpha Coefficient of 0.86. Test-retest results showed a high intraclass correlation: ICC=0.95 (p <0.001, 95% CI: 0.93, 0.96). A moderate positive correlation (r = 0.33) was found between the scores of the Pain Disability Questionnaire and the numerical pain scale. Statistically significant negative correlations were found with the Pain Disability Questionnaire Total (r = -0.70), the Functional Condition (r =- 0.63), and the Psychosocial Component (r =- 0.69) as correlated with the Spitzer Quality of Life Index (QLI). In assessing validity using the known-groups technique, a statistically significant difference was found in scores of the PDQ between subjects with musculoskeletal symptoms and individuals with no disability. The usability evaluation showed rapid application and ease of understanding on the part of subjects of the study. The results indicate that the cross-cultural adaptation process was successful and that the adapted version offers reliable and valid psychometric measures in the Brazilian context.

ASSUNTO(S)

reproducibility of results confiabilidade e validade cumulative trauma disorders incapacidade transtornos traumaticos cumulativos disability

ACESSO AO ARTIGO

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