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Related Concept Videos

Reliability and Validity01:29

Reliability and Validity

Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.

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The Pain Disability Questionnaire: a reliability and validity study.

Patrícia Cantu Moreira Giordano1, Neusa Maria Costa Alexandre, Roberta Cunha Matheus Rodrigues

  • 1Departamento de Enfermagem, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, SP, Brazil. paticmg@fcm.unicamp.br

Revista Latino-Americana De Enfermagem
|April 7, 2012
PubMed
Summary
This summary is machine-generated.

This study successfully translated and validated the Pain Disability Questionnaire (PDQ) for Brazilian Portuguese speakers. The adapted PDQ demonstrates reliable psychometric properties for assessing pain disability in chronic musculoskeletal disorders.

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Area of Science:

  • Rehabilitation Medicine
  • Psychometrics
  • Health Sciences

Background:

  • The Pain Disability Questionnaire (PDQ) is a crucial tool for assessing functional limitations.
  • Cultural adaptation and validation are necessary for international use.

Purpose of the Study:

  • Translate and adapt the PDQ into Brazilian Portuguese.
  • Evaluate the psychometric properties and practicability of the adapted PDQ.

Main Methods:

  • Translation, synthesis, back-translation, expert review, and pre-testing were employed.
  • 119 patients with chronic musculoskeletal disorders completed the adapted PDQ.
  • Reliability (Cronbach's alpha=0.86, test-retest), validity, and correlation with pain and quality of life measures were assessed.

Main Results:

  • The Brazilian Portuguese PDQ showed high reliability (Cronbach's alpha=0.86) and test-retest stability.
  • Moderate correlation with numerical pain scale; significant negative correlations with quality of life and functional components.
  • Construct validity confirmed by significant differences between symptomatic and asymptomatic groups.

Conclusions:

  • The adapted PDQ is a reliable and valid instrument for assessing pain disability in Brazilian patients.
  • The questionnaire is practical, easy to understand, and quick to administer.
  • Successful cultural adaptation enhances its utility in Portuguese-speaking populations.