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Related Experiment Videos

Development and construct validity of a knee pain questionnaire.

Michel E H Boeckstyns1

  • 1Department of Orthopaedic Surgery, Municipality of Copenhagen Hospital, HvidovreDenmark.

Pain
|October 1, 1987
PubMed
Summary

A 15-item knee pain questionnaire was analyzed using the Rasch model. Ten items formed a reliable scale, allowing total positive responses to measure knee pain severity.

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Area of Science:

  • Orthopedics
  • Medical Informatics
  • Psychometrics

Background:

  • Knee pain is a common ailment requiring accurate measurement tools.
  • Existing questionnaires may lack psychometric rigor for precise pain assessment.

Purpose of the Study:

  • To develop and validate a psychometrically sound questionnaire for measuring knee pain.
  • To assess the suitability of a 15-item dichotomous questionnaire using Rasch analysis.

Main Methods:

  • Item analysis of a 15-item knee pain questionnaire.
  • Application of the probabilistic Rasch model for data analysis.
  • Evaluation of item homogeneity and scale properties.

Main Results:

  • Five items were discarded due to poor fit to the Rasch model.
  • The remaining 10 items demonstrated homogeneity, forming a valid scale.
  • The total number of positive responses serves as a simple measure of knee pain.

Conclusions:

  • A 10-item scale derived from the initial questionnaire is suitable for measuring knee pain.
  • Further research is needed to confirm the scale's reliability and empirical validity.
  • The Rasch model provides a robust framework for developing patient-reported outcome measures.

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