The VETSA is a nationwide longitudinal project designed to examine genetic and environmental influences on late midlife cognitive and brain changes. Starting in 2002, the baseline VETSA assessment conducted in-person testing of a community-dwelling sample of 1237 male twins ages 51-60 including a five- year follow-up completed in 2013. The project is unique in its inclusion of an in depth cognitive battery, magnetic resonance imaging data, neuroendocrine data, biomedical, biomarker, and psychosocial measures in the same middle-aged adults in the context of a behavior genetic study.
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Midlife in the United States (MIDUS) is a national longitudinal study of health and well-being. It was conceived by a multidisciplinary team of scholars interested in understanding aging as an integrated bio-psycho-social process. Since its inception in 1995 MIDUS has continued to grow, such that it now includes data from over 10,000 individuals, comprising thousands of variables in different scientific areas among distinct cohorts.
A key part of the CLOSER project is the creation of a Uniform Search Platform allowing users to search the metadata from all of the projects included to find key variables for their research. The metadata will be substantially enhanced and made available in DDI-Lifecycle format.