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Better assessment of physical function: item improvement is neglected but essential |
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| Authors: | Bonnie Bruce James F Fries Debbie Ambrosini Bharathi Lingala Barbara Gandek Matthias Rose John E Ware |
| Affiliation: | (1) Department of Medicine, Stanford University School of Medicine, 1000 Welch Road, Suite 203, Stanford, CA 94304, USA;(2) QualityMetric Inc, 640 George Washington Highway, Suite 201, Lincoln, RI 02865, USA;(3) Department of Psychosomatic Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany |
| Abstract: | IntroductionPhysical function is a key component of patient-reported outcome (PRO) assessment in rheumatology. Modern psychometric methods, such as Item Response Theory (IRT) and Computerized Adaptive Testing, can materially improve measurement precision at the item level. We present the qualitative and quantitative item-evaluation process for developing the Patient Reported Outcomes Measurement Information System (PROMIS) Physical Function item bank. |
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