Evaluation of the Late Life Disability Instrument in the Lifestyle Interventions and Independence for Elders Pilot (LIFE-P) Study


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dc.contributor.author Hsu, Fang-Chi en_US
dc.contributor.author Rejeski, W Jack en_US
dc.contributor.author Ip, Edward H en_US
dc.contributor.author Katula, Jeff A en_US
dc.contributor.author Fielding, Roger en_US
dc.contributor.author Jette, Alan M en_US
dc.contributor.author Studenski, Stephanie A en_US
dc.contributor.author Blair, Steven N en_US
dc.contributor.author Miller, Michael E en_US
dc.date.accessioned 2012-01-09T15:44:32Z
dc.date.available 2012-01-09T15:44:32Z
dc.date.copyright 2010 en_US
dc.date.issued 2010-10-06 en_US
dc.identifier.citation Hsu, Fang-Chi, W Jack Rejeski, Edward H Ip, Jeff A Katula, Roger Fielding, Alan M Jette, Stephanie A Studenski, Steven N Blair, Michael E Miller. "Evaluation of the Late Life Disability Instrument in the Lifestyle Interventions and Independence for Elders Pilot (LIFE-P) Study" Health and Quality of Life Outcomes 8:115. (2010) en_US
dc.identifier.issn 1477-7525 en_US
dc.identifier.uri http://hdl.handle.net/2144/2839
dc.description.abstract BACKGROUND. The late life disability instrument (LLDI) was developed to assess limitations in instrumental and management roles using a small and restricted sample. In this paper we examine the measurement properties of the LLDI using data from the Lifestyle Interventions and Independence for Elders Pilot (LIFE-P) study. METHODS. LIFE-P participants, aged 70-89 years, were at elevated risk of disability. The 424 participants were enrolled at the Cooper Institute, Stanford University, University of Pittsburgh, and Wake Forest University. Physical activity and successful aging health education interventions were compared after 12-months of follow-up. Using factor analysis, we determined whether the LLDI's factor structure was comparable with that reported previously. We further examined how each item related to measured disability using item response theory (IRT). RESULTS. The factor structure for the limitation domain within the LLDI in the LIFE-P study did not corroborate previous findings. However, the factor structure using the abbreviated version was supported. Social and personal role factors were identified. IRT analysis revealed that each item in the social role factor provided a similar level of information, whereas the items in the personal role factor tended to provide different levels of information. CONCLUSIONS. Within the context of community-based clinical intervention research in aged populations, an abbreviated version of the LLDI performed better than the full 16-item version. In addition, the personal subscale would benefit from additional research using IRT. TRIAL REGISTRATION. The protocol of LIFE-P is consistent with the principles of the Declaration of Helsinki and is registered at http://www.ClinicalTrials.gov (registration # NCT00116194). en_US
dc.description.sponsorship National Institutes of Health, National Institute on Aging (U01 AG22376); Intramural Research Program, National Institute on Aging, National Institutes of Health; Claude D. Pepper Older Americans Independence Center (1P30AG21332, P30AG024827); United States Department of Agriculture (58-1950-4-401) en_US
dc.language.iso en en_US
dc.publisher BioMed Central en_US
dc.rights Copyright 2010 Hsu et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. en_US
dc.rights.uri http://creativecommons.org/licenses/by/2.0 en_US
dc.title Evaluation of the Late Life Disability Instrument in the Lifestyle Interventions and Independence for Elders Pilot (LIFE-P) Study en_US
dc.type article en_US
dc.identifier.doi 10.1186/1477-7525-8-115 en_US
dc.identifier.pubmedid 20925931 en_US
dc.identifier.pmcid 2984553 en_US

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