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Activity Number:
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439
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Type:
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Topic Contributed
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Date/Time:
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Wednesday, August 5, 2009 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Statistics in Epidemiology
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| Abstract - #305810 |
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Title:
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SF-36 Among Older Americans with Traumatic Brain Injury: Reliability, Factor Structure, and Impact of Injury Severity and Race
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Author(s):
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Chengwu Yang*+ and Anbesaw W. Selassie and Rickey E. Carter and Barbara C. Tilley
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Companies:
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Medical University of South Carolina and Medical University of South Carolina and Medical University of South Carolina and Medical University of South Carolina
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Address:
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117 Heritage Circle, Mt. Pleasant, SC, 29464,
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Keywords:
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SF-36 ; traumatic brain injury ; reliability ; differential item functioning (DIF) ; confirmatory factor analysis (CFA) ; multiple-indicator multiple-causes (MIMIC) models.
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Abstract:
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Evaluate reliability and factor structure of SF-36 in older Americans with traumatic brain injury (TBI), and effects of injury severity and race on its items and domains. 654 older, racially diverse TBI cases were selected. Reliability and factor structure of SF-36 were evaluated using Cronbach's alpha and confirmatory factor analysis (CFA). Multiple-indicator multiple-causes models (MIMIC) were used to study effects of injury severity and race on items and domains of SF-36. SF-36 was reliable and its factor structure was confirmed. While TBI severity did not impact latent domain scores of SF-36, race did. Blacks had higher vitality and lower role-emotional scores than whites. The measurement model was invariant to injury severity and race. SF-36 was reliable and useful to identify physical and mental health status after TBI in racially diverse elderly population.
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