At a glance
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Vitamin D Status and Intakes and Their Association With Cognitive Trajectory in a Longitudinal Study of Urban Adults
In Brief
An observational study evaluating Vitamin D for Cognitive Decline and Cognitive Impairment. Completed, enrolled 3,720 participants across 1 site.
Detailed Summary
Serum 25(OH)D, dietary and supplemental vitamin D were shown to influence cognitive outcomes in large epidemiological studies. Sex/age-specific and race-specific associations of vitamin D status and intake were examined with longitudinal change in various cognitive domains in a large sample of ethnically and socio-economically diverse US urban adults. Two prospective waves of data from Healthy Aging in Neighborhoods of Diversity across the Life Span (HANDLS) study were used, specifically visit 1: 2004-2009 and visit 2: 2009-2013, mean follow-up time±SD: 4.64±0.93y. Cognitive performance was assessed using 11 test scores covering domains of global cognition, attention, learning/memory, executive function, visuo-spatial/visuo-construction ability, psychomotor speed and language/verbal. Serum 25(OH)D, vitamin D intake and use of supplements containing vitamin D were the key exposures. Multiple mixed-effects linear regression models were conducted, (N=1,231-1,803, k=1.5-2.0 observation/participant).