The Glostrup Population Studies are population-based cohort studies performed in the western part of Greater Copenhagen, Denmark, since 1964. The studies are health examination studies with clinical and biochemical data and data from questionnaires and interviews. The 1914 cohort was aimed at investigating risk factors for coronary heart disease, but also included a psychological assessment and later ageing. The baseline study included participants born in 1914, thus aged 50 years at the time of the health examination in 1964. Repeated assessments were conducted at 10-year intervals from age 50 and every 5 years from age 70 to age 95 (in 2009). In 1984 and 1989, the cohort was expanded with new random samples of persons born in 1914.