a1 The Norwegian Institute of Public Healthjennifer.email@example.com
a2 The Norwegian Institute of Public Health
a3 The Norwegian Institute of Public Health
The Norwegian Institute of Public Health in Oslo has an ongoing program of twin research using population-based cohorts of twins. The current database includes information on twins identified through the Medical Birth Registry of Norway and born from 1967–1979, altogether 15,370 twins. This is a longitudinal study with a cohort sequential design whereby new cohorts are recruited into the study at 5–6 year intervals. Sub-samples of these twins have participated in questionnaire studies and clinical assessment sub-projects. These projects include national and international collaborations. Our primary areas of interest include mental health and psychological well-being, obesity, asthma and allergies, health behaviors and health perceptions, comorbidity, and perinatal influences on health outcomes. This paper provides a brief overview of the data, sample, and the various research projects associated with this twin program of research.
c1 Address for correspondence: Jennifer Harris, The Norwegian Institute of Public Health, Division of Epidemiology Post Box 4404 Nydalen N-0403 Oslo, Norway.