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Development of an item bank for the EORTC Role Functioning Computer Adaptive Test (EORTC RF-CAT).

Eva-Maria Gamper1,2, Morten Aa Petersen3, Neil Aaronson4

  • 1Department for Psychiatry and Psychotherapy and Department for Nuclear Medicine, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria. eva.gamper@uki.at.

Health and Quality of Life Outcomes
|May 7, 2016
PubMed
Summary

A new computer-adaptive test (CAT) for Role Functioning (RF) was developed, improving assessment precision and efficiency for cancer patients. This Role Functioning-CAT (RF-CAT) can reduce sample sizes by up to 50% in oncology research.

Keywords:
CancerComputer-adaptive testHealth related quality of lifeOncologyQLQ-C30Role functioning

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Area of Science:

  • Oncology
  • Psychometrics
  • Health-related quality of life (HRQOL)

Background:

  • Role Functioning (RF) is a key component of HRQOL, encompassing occupational and social roles for cancer patients and survivors.
  • Current assessment methods for RF can be improved for greater precision and efficiency.
  • This study aimed to develop a computer-adaptive test (CAT) for RF as part of a larger project to create a CAT version of the EORTC QLQ-C30.

Purpose of the Study:

  • To develop and validate a computer-adaptive test (CAT) for assessing Role Functioning (RF) in cancer patients.
  • To create a more precise and efficient instrument for measuring RF compared to existing scales.
  • To contribute to the development of a CAT version of the EORTC QLQ-C30.

Main Methods:

  • The development followed a four-phase approach: conceptualization, expert review, patient feedback, and international field testing.
  • Item response theory (IRT) analyses were used to calibrate the item bank and evaluate psychometric properties.
  • Field testing involved 1,023 cancer patients across Austria, Denmark, Italy, and the UK.

Main Results:

  • A provisional list of 12 items was refined to a 10-item bank with strong psychometric properties after field testing.
  • The resulting RF-CAT item bank demonstrated excellent reliability (mean = 0.85, median = 0.95).
  • Utilizing the RF-CAT could lead to sample size reductions of 11% to 50% compared to the QLQ-C30 RF scale.

Conclusions:

  • The developed RF-CAT item bank enhances the accuracy and efficiency of Role Functioning assessment.
  • This improved assessment tool is poised for integration into oncology research and clinical practice.
  • The RF-CAT offers significant advantages in terms of precision and potential sample size savings.