Longitudinal Study of Aging Danish Twins (LSADT)

Focus has been on elucidating the causes of variation in survival, health, diseases, loss of abilities, and cognitive functions among the elderly and oldest-old. Was conducted every 2 years between 1995-2005 and consists of 6 waves. Comprises interviews of elderly Danish twins aged 75 years & older (later 70 years & older). At each interview wave, the interview assessment has been based on the interview used in the previous waves, which covers health, physical functioning, cognitive functioning, depression symptomatology, social factors, lifestyle characteristics, and quality of life. The self-report interview assessments have been supplemented with objective indicators of physical strength and agility, behavioral speed, and pulmonary peak-flow. Biological material was also collected from the participants for future DNA analysis.