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- Title
Differential item functioning of the patient-reported outcomes information system (PROMIS<sup>®</sup>) pain interference item bank by language (Spanish versus English).
- Authors
Paz, Sylvia; Spritzer, Karen; Reise, Steven; Hays, Ron; Paz, Sylvia H; Spritzer, Karen L; Reise, Steven P; Hays, Ron D
- Abstract
<bold>Background: </bold>About 70% of Latinos, 5 years old or older, in the United States speak Spanish at home. Measurement equivalence of the PROMIS® pain interference (PI) item bank by language of administration (English versus Spanish) has not been evaluated.<bold>Methods: </bold>A sample of 527 adult Spanish-speaking Latinos completed the Spanish version of the 41-item PROMIS® pain interference item bank. We evaluate dimensionality, monotonicity and local independence of the Spanish-language items. Then we evaluate differential item functioning (DIF) using ordinal logistic regression with item response theory scores estimated from DIF-free "anchor" items.<bold>Results: </bold>One of the 41 items in the Spanish version of the PROMIS® PI item bank was identified as having significant uniform DIF.<bold>Conclusions: </bold>English- and Spanish-speaking subjects with the same level of pain interference responded differently to 1 of the 41 items in the PROMIS® PI item bank. This item was not retained due to proprietary issues. The original English language item parameters can be used when estimating PROMIS® PI scores.
- Subjects
UNITED States; PAIN; ITEM response theory; PSYCHOMETRICS; TREATMENT effectiveness; DIFFERENTIAL item functioning (Research bias); HISPANIC Americans; INFORMATION storage &; retrieval systems; LANGUAGE &; languages; QUALITY of life; RESEARCH funding; LOGISTIC regression analysis
- Publication
Quality of Life Research, 2017, Vol 26, Issue 6, p1451
- ISSN
0962-9343
- Publication type
journal article
- DOI
10.1007/s11136-017-1499-3