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dc.contributor.authorHsu, Fang-Chien_US
dc.contributor.authorRejeski, W. Jacken_US
dc.contributor.authorIp, Edward H.en_US
dc.contributor.authorKatula, Jeff A.en_US
dc.contributor.authorFielding, Rogeren_US
dc.contributor.authorJette, Alan M.en_US
dc.contributor.authorStudenski, Stephanie A.en_US
dc.contributor.authorBlair, Steven N.en_US
dc.contributor.authorMiller, Michael E.en_US
dc.date.accessioned2012-01-09T15:44:32Z
dc.date.available2012-01-09T15:44:32Z
dc.date.copyright2010
dc.date.issued2010-10-06
dc.identifier.citationHsu, 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)
dc.identifier.issn1477-7525
dc.identifier.urihttp://hdl.handle.net/2144/2839
dc.description.abstractBACKGROUND. 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.sponsorshipNational 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.isoenen_US
dc.publisherBioMed Centralen_US
dc.rightsCopyright 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.urihttp://creativecommons.org/licenses/by/2.0
dc.titleEvaluation of the Late Life Disability Instrument in the Lifestyle Interventions and Independence for Elders Pilot (LIFE-P) Studyen_US
dc.typearticleen_US
dc.identifier.doi10.1186/1477-7525-8-115
dc.identifier.pubmedid20925931
dc.identifier.pmcid2984553


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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.
Except where otherwise noted, this item's license is described as 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.