OMNIBUS I and OMNIBUS II were launched as umbrella projects for sub-projects studying the importance of genes and environment for the development of common diseases and health conditions in young twins.
For both OMNIBUS I-II standardized questionnaires were developed and mailed to the participants. A total of 29,433 twins born from 1953-1982 participated in OMNIBUS I, and in OMNIBUS II a total of 34,934 twins born from 1931-1982 participated. A major part of the twins participated in both OMNIBUS I and OMNIBUS II.
Focus areas for OMNIBUS 1994
Specific diseases:
- Diabetes
- Arthritis
- Epilepsy
- Migraine
- Intestinal bowel disease
- Anorexia
- Back pain
- Metabolic disorders
Other factors:
- Socio-demographic factors
- Hospitalizations
- Medications
- Fertility
- Lifestyle factors
- Anthropometric measures
Focus areas for OMNIBUS 2002
Specific diseases:
- Migraine
- Back pain
- Pulmonary health
- Hearing and speech
Other factors:
- Socio-demographic factors
- Lifestyle factors
- Anthropometric measures
- Mood and personality