Differential item functioning was negligible in an adaptive test of functional status for patients with knee impairments who spoke English or Hebrew.
Objective: We examined the presence and impact of differential item functioning (DIF) in a set of knee-specific functional status (FS) items administered using computerized adaptive testing (CAT) among English (United States) and Hebrew (Israel) speaking patients receiving therapy for knee impairmen...
| Publicado en: | Quality of Life Research Vol. 18; no. 8; pp. 1067 - 1084 |
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| Autores principales: | , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Oct2009
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105226064&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105226064 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09629343 GPQ jtl: Quality of Life Research issn: 09629343 maglogo: N pubinfo: dt: Oct2009 vid: 18 iid: 8 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 105226064 NLM19653127 2010403119 10.1007/s11136-009-9517-8 NLM19653127 105226064 ppf: 1067 ppct: 17 formats: fmt: @attributes: type: P tig: atl: Differential item functioning was negligible in an adaptive test of functional status for patients with knee impairments who spoke English or Hebrew. aug: au: Hart DL Deutscher D Crane PK Wang YC Hart, Dennis L Deutscher, Daniel Crane, Paul K Wang, Ying-Chih affil: Focus On Therapeutic Outcomes, Inc., P.O. Box 11444, Knoxville, TN 37939, USA sug: subj: Activities of Daily Living Disability Evaluation Knee Knee Injuries Diagnosis Differential Item Functioning Adaptation, Psychological Adolescence Adult Aged Aged, 80 and Over Confidence Intervals Culture Diagnosis, Computer Assisted Factor Analysis Female Health Status Indicators Human International Relations Israel Knee Joint Logistic Regression Male Middle Age Statistics Stress, Psychological United States Young Adult Adolescent: 13-18 years Adult: 19-44 years Aged: 65+ years Aged, 80 & over Middle Aged: 45-64 years Female Male ab: Objective: We examined the presence and impact of differential item functioning (DIF) in a set of knee-specific functional status (FS) items administered using computerized adaptive testing (CAT) among English (United States) and Hebrew (Israel) speaking patients receiving therapy for knee impairments. DIF occurs in an item if probabilities of endorsing responses differ across groups after controlling for the FS measured.Methods: We analyzed data from 28,320 patients (14,160 U.S., 14,160 Israel) who completed the knee-specific CAT. Items were assessed for DIF by gender, age, symptom acuity, surgical history, exercise history, and language spoken using a hybrid technique that combines multiple ordinal logistic regression and item response theory FS estimates.Results: Several items had non-uniform DIF for covariates including language, but unadjusted and DIF-adjusted functional status estimates were in strong concordance [ICC(2,1) values >/=0.97], and differences between unadjusted and adjusted FS scores represented <0.4% of the unadjusted FS standard deviation.Conclusions: Statistically significant DIF was identified in some items but represented negligible clinical impact. Results suggested no need to adjust items for DIF when assessing FS outcomes across groups of patients with knee impairments who answer the knee CAT items in English in the United States or Hebrew in Israel. These findings suggest negligible differences in cultural perceptions between English and Hebrew wording of these knee-specific CAT FS items. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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