Mid-life serum Vitamin D concentrations were associated with incident dementia but not late-life neuropsychological performance in the Atherosclerosis Risk in Communities (ARIC) Study

Autor: Oluwaseun E. Fashanu, Di Zhao, Andrea L. C. Schneider, Andreea M. Rawlings, A. Richey Sharrett, Pamela L. Lutsey, Rebecca F. Gottesman, Alden L. Gross, Eliseo Guallar, Alvaro Alonso, Thomas H. Mosley, Erin D. Michos
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: BMC Neurology, Vol 19, Iss 1, Pp 1-13 (2019)
Druh dokumentu: article
ISSN: 1471-2377
DOI: 10.1186/s12883-019-1483-3
Popis: Abstract Background Activated Vitamin D has anti-inflammatory properties and adequate 25-hydroxyvitamin D [25(OH)D] concentrations may be important for neurocognitive function and protection against neurologic injury. We examined whether mid-life 25(OH) D concentrations were associated with later-life performance on neuropsychological testing, functional ability, depressive symptoms, and incident dementia. Methods We studied 13,039 white and black ARIC participants who had serum 25(OH) D measured mid-life at visit 2 (1990–1992). Over the next ~ 20 years through visit 5 (2011–2013), participants underwent 3 additional in-person visits, annual telephone calls, and hospitalization surveillance. An extensive battery of neuropsychological outcomes were assessed at visit 5 using standardized protocols. Incident dementia was ascertained through a formal algorithm that included data from in-person cognitive testing, telephone interviews, hospital discharge codes, and death certificate codes. Diagnoses of dementia were adjudicated by expert clinician committee. For the primary cognitive analyses, we imputed for missing covariates and outcomes and used linear regression to evaluate non-concurrent cross-sectional associations of mid-life 25(OH) D (visit 2) with late-life neuropsychological outcomes (visit 5). We also used Cox regression models to examine associations of mid-life 25(OH) D and incident dementia. Results In mid-life, the mean (SD) age of participants was 57 (6) years, 57% were women, and 24% black. Mean (SD) 25(OH) D was 24.3 (8.6) ng/mL; 33% had deficient (
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