The focus of the Longitudinal Study of Aging Danish Twins (LSADT) is to better understand the causes of variations in survival, health, diseases, ability loss and cognitive functions among the elderly and the oldest-old. The LSADT was conducted every two years between 1995 and 2005 and consists of six waves. The study is comprised of interviews of elderly Danish twins aged 75 years and older (later, 70 years and older). At each interview wave, the assessment was based on the interview used in the previous waves, which covered health, physical functioning, cognitive functioning, depression symptomatology, social factors, lifestyle characteristics and quality of life. The self-report interview assessments were 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.
Project PI: Kaare Christensen