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Gepubliceerd in: Quality of Life Research 1/2018

05-09-2017

Differential item functioning by language on the PROMIS® physical functioning items for children and adolescents

Auteurs: Ron D. Hays, José Luis Calderón, Karen L. Spritzer, Steve P. Reise, Sylvia H. Paz

Gepubliceerd in: Quality of Life Research | Uitgave 1/2018

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Abstract

Purpose

To assess the equivalence of self-reports of physical functioning between pediatric respondents to the English- and Spanish-language patient-reported outcomes measurement information system (PROMIS®) physical functioning item banks.

Methods

The PROMIS pediatric physical functioning item banks include 29 upper extremity items and 23 mobility items. A sample of 5091 children and adolescents (mean age = 12 years, range 8–17; 49% male) completed the English-language version of the items. A sample of 605 children and adolescents (mean age = 12 years, range 8–17; 55% male; 96% Hispanic) completed the Spanish-language version of the items.

Results

We found language (English versus Spanish) differential item functioning (DIF) for 4 upper extremity items and 7 mobility items. Product-moment correlations between estimated upper extremity and mobility scores using the English versus the equated Spanish item parameters for Spanish-language respondents were 0.98 and 0.99, respectively. After excluding cases with significant person misfit, we found DIF for the same 4 upper extremity items that had DIF in the full sample and for 12 mobility items (including the same 7 mobility items that had DIF in the full sample). The identification of DIF items between English- and Spanish-language respondents was affected slightly by excluding respondents displaying person misfit.

Conclusions

The results of this study provide support for measurement equivalence of self-reports of physical functioning by children and adolescents who completed the English- and Spanish-language surveys. Future analyses are needed to replicate the results of this study in other samples.
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Metagegevens
Titel
Differential item functioning by language on the PROMIS® physical functioning items for children and adolescents
Auteurs
Ron D. Hays
José Luis Calderón
Karen L. Spritzer
Steve P. Reise
Sylvia H. Paz
Publicatiedatum
05-09-2017
Uitgeverij
Springer International Publishing
Gepubliceerd in
Quality of Life Research / Uitgave 1/2018
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-017-1691-5

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