The Betula Project is a longitudinal study on aging, memory and dementia and has been going on for a period of 20 years.
The participants of the project have been tested, interviewed and examined medically at five occasions (1988-1990, 1993-1995, 1998-2000, 2003-2005 and 2008-2010).
The main objectives of the project is to study how memory functions change during adult life and old age, to identify risk factors for dementia and to identify early preclinical signs of dementia.