The ITR has enrolled approximately 29,000 twins across Italy, with ongoing registration across all age groups nationwide, including both identical and fraternal twins. At inception, there was an even gender split, and the majority of the twins resided in the northern area of Italy. The distribution of twin pairs varies by year of birth, with around 20% of the twins being monozygotic.
Study design
Cohort - twin
Number of participants at first data collection
11,376 (children)
17,970 (adults)
Age at first data collection
Varied (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
2001
Primary Institutions
Istituto Superiore di Sanità (ISS)
Links
Profile paper DOI
Funders
Ministry of Health (Ministero della Salute)
Ongoing?
Yes
Data types collected
Engagement
Keywords
Consortia and dataset groups