Individual Study / FTC

The finish twin cohort

The finish twin cohort

Initiatives -
The Twin study is a large research collection of data and samples from Finnish twins. three waves in 1975, 1981 and 1990. The fourth wave data collection was conducted in three separate sub-studies by year of birth. **Contact:**
Start Year
End Year
Studies within the Finnish Twin Cohort have been supported, among others, by the Academy of Finland Center of Excellence in Complex Disease Genetics (grants 213506 and 129680), the Academy of Finland (grants 100499, 205585, 118555 and 141054), Global Research Awards for Nicotine Dependence (GRAND), European Network for Genetic and Genomic Epidemiology (ENGAGE), FP7-HEALTH-F4-2007 (grant 201413), NIH (grants DA12854, AA12502, AA00145, AA09203, AA15416) and the Sanger Institute. The support of the Nordic Cancer Union, The Finnish Cancer Society, the Sigrid Juselius Foundation and The Jenny and Antti Wihuri Foundation is also gratefully acknowledged.
Visit FTC


Investigators Contacts
  • Dr. Prof. Jaakko Kaprio
    University of Helsinki


Study design
Population cohort
Follow Up
Register-linkages to various medical registers have taken place. Since the 1990 questionnaire, many twins have been asked to participate in selected sub-studies which have focused on specific study questions and traits, but no unselected questionnaire survey had been conducted after that. In 2011 a questionnaire was mailed for the 35-year follow-up.

Marker Paper

Kaprio J. The Finnish Twin Cohort Study: an update. Twin Res Hum Genet. 2013 Feb;16(1):157-62. doi: 10.1017/thg.2012.142. Epub 2013 Jan 8.

PUBMED 23298696


Sources of Recruitment
  • Families

Number of participants

Number of participants
Number of participants with biosamples


Availability of data and biosamples


Availability of access information

On the study website :

Supplementary Information