A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression.

A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression. Research Abstract Details 

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A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression. Abstract Text:

Paul K Crane,Laura E Gibbons,Katja Ocepek-Welikson,Karon Cook,David Cella,Kaavya Narasimhalu,Ron D Hays,Jeanne A Teresi,

BACKGROUND: Several techniques have been developed to detect differential item functioning (DIF), including ordinal logistic regression (OLR). This study compared different criteria for determining whether items have DIF using OLR. OBJECTIVES: To compare and contrast findings from three different sets of criteria for detecting DIF using OLR. General distress and physical functioning items were evaluated for DIF related to five covariates: age, marital status, gender, race, and Hispanic origin. RESEARCH DESIGN: Cross-sectional study. SUBJECTS: 1,714 patients with cancer or HIV/AIDS. MEASURES: A total of 23 items addressing physical functioning and 15 items addressing general distress were selected from a pool of 154 items from four different health-related quality of life questionnaires. RESULTS: The three sets of criteria produced qualitatively and quantitatively different results. Criteria based on statistical significance alone detected DIF in almost all the items, while alternative criteria based on magnitude detected DIF in far fewer items. Accounting for DIF by using demographic-group specific item parameters had negligible effects on individual scores, except for race. CONCLUSIONS: Specific criteria chosen to determine whether items have DIF have an impact on the findings. Criteria based entirely on statistical significance may detect small differences that are clinically negligible.

A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression. Publishing Authors By Initials

PK Crane,LE Gibbons,K Ocepek-Welikson,K Cook,D Cella,K Narasimhalu,RD Hays,JA Teresi,

For similar investigative techniques: epidemiologic methods: data collection: questionnaires research abstracts see: investigative techniques: epidemiologic methods: data collection: questionnaires research

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A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Quality of life research : an international journa

VOLUME: 16 Suppl 1

Page Numbers: 69-84

Journal Abbreviation:

ISSN: 0962-9343

DAY: 7

MONTH: 06

YEAR: 2007

A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression. Information

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LANGUAGE: eng

NlmUniqueID: 9210257

A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression. Keywords Mesh Terms:

KEYWORDS: Questionnaires

MESH TERMS: methods

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Grant and Affiliation Information for A comparison of three sets of criteria for determining the presence of differential item functioning using ordinal logistic regression.

AFFILIATION: Department of Internal Medicine, Harborview Medical Center, University of Washington, 325 Ninth Avenue, Box 359780, Seattle, WA 98104, USA. pcrane@u.washington.edu

Country: Netherlands

AGENCY: United States NCI

GRANT: R01 CA60068

ACRONYM: CA

MEDLINETA: Qual Life Res

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