Patient-Reported Outcomes Measurement in Orthopaedic Assessment

Patient-reported outcomes (PROs) capture health status directly from the patient without interpretation by clinicians or others, offering critical insight into pain, function and quality of life after orthopaedic interventions. In recent years, methodological advances have centred on standardising PRO instruments, notably through the Patient-Reported Outcomes Measurement Information System (PROMIS), which employs item response theory (IRT) to calibrate large item banks and deliver tailored assessments via computerised adaptive testing (CAT). These approaches improve measurement precision, reduce respondent burden and facilitate comparison across conditions and centres. Key psychometric properties in orthopaedics include validity (the extent to which an instrument measures its intended construct), reliability (consistency of measurement), responsiveness (sensitivity to clinical change) and interpretability (including minimal clinically important difference, or MCID). PRO measurement now underpins clinical trials, registries and routine care, informing shared decision-making, benchmarking of surgical techniques and health-services research. The global significance of PROs lies in their ability to harmonise outcome reporting, guide resource allocation and ensure that patient priorities—such as pain relief and functional independence—drive innovation in implant design, rehabilitation protocols and care pathways.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Patient-Reported Outcomes Measurement in Orthopaedic Assessment publication trend

The graph below shows the total number of articles in patient-reported outcomes measurement in orthopaedic assessment across all publications each year (not limited to Nature Index journals).

Technical terms

Patient-reported outcome (PRO): A measure of health status reported directly by the patient without external interpretation.

PROMIS (Patient-Reported Outcomes Measurement Information System): A set of rigorously developed item banks and instruments using IRT to assess physical, mental and social health.

Item response theory (IRT): A statistical framework for calibrating questionnaire items according to their difficulty and discrimination parameters.

Computerised adaptive testing (CAT): A dynamic assessment method that selects subsequent questions based on prior responses to optimise precision.

Responsiveness: The ability of an instrument to detect clinically meaningful change over time.

Minimal clinically important difference (MCID): The smallest change in a PRO score perceived as beneficial by patients.

Floor and ceiling effects: The clustering of responses at the extreme low or high ends of a scale, limiting sensitivity to change.

References

1. Patient-reported outcomes measurement information system instruments in knee arthroplasty patients: a systematic review of the literature. Knee Surgery & Related Research (2023).
2. Item Response Theory, Computerized Adaptive Testing, and PROMIS: Assessment of Physical Function. The Journal of Rheumatology (2013).
3. Reporting and utilization of Patient-Reported Outcomes Measurement Information System® (PROMIS®) measures in orthopedic research and practice: a systematic review. Journal of Orthopaedic Surgery and Research (2020).
4. The promise of computer adaptive testing in collection of orthopaedic outcomes: an evaluation of PROMIS utilization. Journal of Patient-Reported Outcomes (2022).