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Differential item functioning impact in a modified version of the Roland–Morris Disability Questionnaire

✍ Scribed by Paul K. Crane; Karynsa Cetin; Karon F. Cook; Kurt Johnson; Richard Deyo; Dagmar Amtmann


Publisher
Springer Netherlands
Year
2007
Tongue
English
Weight
329 KB
Volume
16
Category
Article
ISSN
0962-9343

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## Introduction: Differential item functioning (dif) analyses are commonly used to evaluate health-related quality of life (hrqol) instruments. there is, however, a lack of consensus as to how to assess the practical impact of statistically significant dif results. ## Methods: Using our previousl