Predictors of Retention in the 1Florida Alzheimer’s Disease Research Center (ADRC) Over Two Waves
<b>Background:</b> Attrition is a significant methodological concern in longitudinal studies. Sample loss can limit generalizability and compromise internal validity. <b>Methods:</b> Wave one (<i>n</i> = 346) and wave two follow-ups (<i>n</i> = 196) of the 1Florida ADRC clinical core were examined using a 24-month visit window. <b>Results:</b> The sample (59% Hispanic) demonstrated retention rates of 77.2% and 86.2% in waves one and two, respectively. Predictors of lower retention in wave one included older age, amnestic MCI or dementia, and lower cognition and function scores. Completing a baseline MRI and lack of hippocampal atrophy were associated with higher retention in both waves. In wave two, a greater neighborhood disadvantage score was associated with attrition. <b>Discussion:</b> Predictors of retention changed over time, possibly due to the early withdrawal of the most vulnerable in the initial wave. Understanding predictors of retention can facilitate retention strategies, reduce attrition, and increase the validity of findings.
Authors
- Warren Barker (ORCID: https://orcid.org/0000-0003-2171-7142)
- Shanna L. Burke (ORCID: https://orcid.org/0000-0001-6969-3536)
- Miriam J. Rodríguez (ORCID: https://orcid.org/0000-0002-0816-8313)
- Raquel Behar
- Cesar Chirinos
- Adrienne Grudzien (ORCID: https://orcid.org/0009-0005-1035-0842)
- Idaly Vélez Uribe
- Mónica Rosselli (ORCID: https://orcid.org/0000-0003-2656-9505)
- Michael Marsiske (ORCID: https://orcid.org/0000-0001-5973-2116)
- Mercedes Herrera (ORCID: https://orcid.org/0000-0003-0118-369X)
- Carlos Quiñonez (ORCID: https://orcid.org/0000-0002-8311-3056)
- Joanna Gonzalez
- Malek Adjouadi (ORCID: https://orcid.org/0000-0001-5380-3155)
- Maria T. Greig‐Custo
- David Loewenstein (ORCID: https://orcid.org/0000-0001-6788-2798)
- Ranjan Duara (ORCID: https://orcid.org/0000-0001-8060-6309)
- Yaimara Gonzalez Pineiro
- Rosemarie Rodriguez
Institutions
- University of Miami (US)
- Florida International University (US)
- University of Florida (US)
- Mount Sinai Medical Center (US)
- Indiana University Bloomington (US)
- Florida Atlantic University (US)
Publication Details
- Journal
- Journal of Applied Gerontology
- Published
- 2024-12-10
- DOI
- https://doi.org/10.1177/07334648241302159
- Primary Topic
- Advanced Causal Inference Techniques
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- National Institutes of Health
- National Institute on Aging