Validation of a mobility item bank for older patients in primary care

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Title: Validation of a mobility item bank for older patients in primary care
Authors: Cabrero-García, Julio | Ramos-Pichardo, Juan Diego | Muñoz Mendoza, Carmen Luz | Cabañero-Martínez, María José | González Llopis, Lorena | Reig-Ferrer, Abilio
Research Group/s: Calidad de Vida, Bienestar Psicológico y Salud
Center, Department or Service: Universidad de Alicante. Departamento de Enfermería | Universidad de Alicante. Departamento de Psicología de la Salud
Keywords: Mobility | Differential item functioning | Rasch analysis | Gender differences | Older people | Primary care | Item bank
Knowledge Area: Enfermería | Personalidad, Evaluación y Tratamiento Psicológico
Issue Date: 5-Dec-2012
Publisher: BioMed Central
Citation: Health and Quality of Life Outcomes 2012, 10:147. doi:10.1186/1477-7525-10-147
Abstract: Background: To develop and validate an item bank to measure mobility in older people in primary care and to analyse differential item functioning (DIF) and differential bundle functioning (DBF) by sex. Methods: A pool of 48 mobility items was administered by interview to 593 older people attending primary health care practices. The pool contained four domains based on the International Classification of Functioning: changing and maintaining body position, carrying, lifting and pushing, walking and going up and down stairs. Results: The Late Life Mobility item bank consisted of 35 items, and measured with a reliability of 0.90 or more across the full spectrum of mobility, except at the higher end of better functioning. No evidence was found of non-uniform DIF but uniform DIF was observed, mainly for items in the changing and maintaining body position and carrying, lifting and pushing domains. The walking domain did not display DBF, but the other three domains did, principally the carrying, lifting and pushing items. Conclusions: During the design and validation of an item bank to measure mobility in older people, we found that strength (carrying, lifting and pushing) items formed a secondary dimension that produced DBF. More research is needed to determine how best to include strength items in a mobility measure, or whether it would be more appropriate to design separate measures for each construct.
Sponsor: This research has been supported by a grant from the Spanish Ministry of Health and Social Policy (PI05/1538, Health Research Fund).
ISSN: 1477-7525
DOI: 10.1186/1477-7525-10-147
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2012 Cabrero-Garcia et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Peer Review: si
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Appears in Collections:INV - CV, BP Y S - Artículos de Revistas
INV - PCC-HOI - Artículos de Revistas

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