Midlife in the United States - A national study of Health and Wellbeing.
The main purpose of MIDUS is to collect in-depth, long-term information from a national sample of Americans
about the many factors, such as work and family life, daily stressors, psychological outlooks, social relationships, and community,
that influence their health (mental and physical) as they age. More recently, MIDUS is also assessing numerous biological
and neurological factors that are part of explaining why some Americans remain healthy and vital as they grow older, while
others do not.