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    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2019
    In:  Innovation in Aging Vol. 3, No. Supplement_1 ( 2019-11-08), p. S464-S464
    In: Innovation in Aging, Oxford University Press (OUP), Vol. 3, No. Supplement_1 ( 2019-11-08), p. S464-S464
    Abstract: Understanding predictors of attrition can position researchers to increase retention efforts and focus on preventing attrition. Attrition, or dropout of participants during a study prior to completion, can threaten the internal and external validity of a study’s findings. Data from the 1FloridaADRC Clinical Core was analyzed, and included 271 participants within a two-year follow-up window, of which 216 (79.7%) were retained. T-tests and chi-square analyses were used to determine if a number of demographic, clinical, acculturation, and neuroimaging predictors were associated with attrition. The participant cohort included: 85% with cognitive impairment; 60% Hispanic; 42% over the age of 75; and 62% female. Predictors of greater attrition included: age over 75 years (p & lt; .003); cognitive diagnosis of MCI or dementia (p & lt; .01); and lower scores on the Mini-Mental Status Exam (p & lt;.04), the Hopkins Verbal Learning Test (HVLT) immediate (p & lt; .02), and delayed (p & lt;.002) Higher total score on the Neuropsychiatric Inventory Questionnaire (p & lt;.06), endorsement of night time behaviors (p & lt;.05) and greater hippocampal atrophy (p & lt;.02) were also predictive of attrition. Hispanic ethnicity was not a predictor of attrition, as retention was 81% for Hispanics versus 79% for non-Hispanics. However, among Hispanic participants, English acculturation measured by the Bidimensional Acculturation Scale for Hispanics was lower for those who dropped out (t=2.8; p=.006).
    Type of Medium: Online Resource
    ISSN: 2399-5300
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2905697-4
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