Cognitive Decline Clinical Trial
Official title:
A Large Randomized Trial of Vitamin D, Omega-3 Fatty Acids and Cognitive Decline
The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is an ongoing randomized clinical trial in 25,875 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or omega-3 fatty acids (Omacor® fish oil, 1 gram) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses. This ancillary study is being conducted among participants in VITAL and will examine whether vitamin D or fish oil is associated with cognitive decline in 3000 older participants of VITAL.
Primary aim of annual rate of cognitive decline. Secondary aims will be addressed in sub-set of participants: 1) among participants, African-American race (African-Americans have high risk of Vitamin D deficiency) modifies effects of vitamin D3 supplementation on cognitive decline; 2) among a subset of participants, baseline plasma levels of vitamin D and omega-3 fatty acids modify agent effects. ;
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