These data contain information on homocysteine, clusterin, brain-derived neurotrophic factor (BDNF), and mtDNA copy number.
Procedures for collection, assay, and descriptions of other blood-based variables are included in the documentation Venous blood collection and assay protocol in the 2016 Health and Retirement Study.
These assays were done on a non-random subsample people who participated in the 2016 Venous Blood Study. The sample includes all the participants of the 2016 Healthy Cognitive Aging Project (HCAP) who provided blood samples, younger participants designated for future HCAP assessments, and a subsample of HCAP non-participants. This subsample fully represents the entire HRS sample when weighted.
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