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Item Response Theory and Computerized Adaptive Testing for Orthopaedic Outcomes Measures.
Dane Jensen Brodke1, Man Hung, Kevin J Bozic
1From the Department of Orthopaedic Surgery, University of California San Francisco School of Medicine, San Francisco, CA (Mr. Brodke), the Department of Orthopaedics, University of Utah School of Medicine, Salt Lake City, UT (Dr. Hung), and the Department of Surgery and Perioperative Care, University of Texas at Austin Dell Medical School, Austin, TX (Dr. Bozic).
Patient-reported outcome measures (PROMs) are crucial for tracking symptoms and evaluating treatments. Newer PROMs using item response theory (IRT) offer dynamic, comparable assessments, improving patient care and research efficiency.
Area of Science:
- Health outcomes research
- Psychometrics
- Clinical informatics
Background:
- Patient-reported outcome measures (PROMs) are vital for objective symptom assessment and intervention evaluation.
- Traditional PROMs, based on classical test theory, often lack versatility and comparability.
- Item response theory (IRT) offers advancements in PROM development and application.
Purpose of the Study:
- To highlight the advantages of modern PROMs developed using item response theory (IRT).
- To emphasize the enhanced comparability and dynamic nature of IRT-based PROMs.
- To underscore the suitability of IRT-based instruments for clinical practice and research.
Main Methods:
- Review of classical test theory (CTT) and item response theory (IRT) principles in PROM development.
- Discussion of the characteristics of IRT-based PROMs, including dynamic nature and comparability.
- Exploration of IRT's role in enabling computerized adaptive testing (CAT) for reduced patient burden.
Main Results:
- IRT-based PROMs provide dynamic, comparable instruments, overcoming limitations of static CTT-based measures.
- Computerized adaptive testing (CAT) powered by IRT facilitates rapid and complete data acquisition.
- Validated IRT-based instruments are applicable across diverse patient populations, including orthopaedics.
Conclusions:
- Modern PROMs utilizing IRT offer superior versatility, comparability, and efficiency over traditional measures.
- IRT-based PROMs enhance data collection through methods like CAT, reducing patient burden.
- These advanced PROMs are well-suited for both clinical decision-making and scientific research in various medical fields.
