4.4 Article

USING ITEM RESPONSE THEORY TO IDENTIFY RESPONDERS TO TREATMENT: EXAMPLES WITH THE PATIENT-REPORTED OUTCOMES MEASUREMENT INFORMATION SYSTEM (PROMIS®) PHYSICAL FUNCTION SCALE AND EMOTIONAL DISTRESS COMPOSITE

期刊

PSYCHOMETRIKA
卷 86, 期 3, 页码 781-792

出版社

SPRINGER
DOI: 10.1007/s11336-021-09774-1

关键词

individual change; PROMIS (R); responders to treatment

资金

  1. UCLA Resource Centers for Minority Aging Research Center forHealth Improvement of Minority Elderly (RCMAR/CHIME) under the National Institute on Aging [P30-AG021684]
  2. National Center for Complementary and Integrative Health [R01-AT010402]

向作者/读者索取更多资源

The study found that unless true change in the PROMIS physical function and emotional distress scales is substantial, classical test theory estimates of significant individual change are much more optimistic than estimates of change based on item response theory.
The reliable change index has been used to evaluate the significance of individual change in health-related quality of life. We estimate reliable change for two measures (physical function and emotional distress) in the Patient-Reported Outcomes Measurement Information System (PROMIS (R)) 29-item healthrelated quality of life measure (PROMIS-29 v2.1). Using two waves of data collected 3 months apart in a longitudinal observational study of chronic low back pain and chronic neck pain patients receiving chiropractic care, and simulations, we compare estimates of reliable change from classical test theory fixed standard errors with item response theory standard errors from the graded response model. We find that unless true change in the PROMIS physical function and emotional distress scales is substantial, classical test theory estimates of significant individual change are much more optimistic than estimates of change based on item response theory.

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