CATSS9 - The Child and Adolescent Twin Study in Sweden (9 years, telephone interview)
Overview
The Child and Adolescent Twin Study in Sweden (CATSS) is an ongoing longitudinal twin study that targets all twins born in Sweden since July 1, 1992 and living in Sweden at the study inquiries. Between 2004 and 2019, twin parents were interviewed about the children's somatic and psychological health and social environment in connection with their 9th birthday (CATSS9). As of 2020, the telephone interview has been replaced with a web survey (CATSS9W). At age 15 (CATSS15) and age 18 (CATSS18), twins and parents complete a web-based questionnaire that, in addition to assessments of somatic and mental health, includes measures of personality development and psychosocial adjustment. At the age of 24 (CATSS24), twins complete a web survey that focuses primarily on mental health.
Fundraising for CATSS9 started in 2004 and ended in 2019. Parents of all of Sweden's 9-year-old twins were invited to participate in a telephone interview regarding the twins' health and behavior. The interview captured various health problems such as asthma, allergies and diabetes as well as behaviors such as physical activity and social interaction. The number of participating twins is 34400, with a response rate of 69%.
In connection with the CATSS9 interview, the parents also received a request to provide DNA via saliva samples from the twins. The saliva sample is used for zygosity determination and genotyping. The number of genotyped twins participating in CATSS9 is 21 500 (December 2024).
Question areas:
Administrative Information
Allergy, Asthma, Eczema
A-TAC - Autism - Tics, AD/HD and other Comorbidities inventory
CPTI - Child Problematic Traits Inventory
Demographic Information
Drugs
LSC-R Life Stressor Checklist- Revised (trauma)
Physical Activity
PTSD - DSM-IV Criteria for Posttraumatic Stress Disorder (trauma)
SCARED - Screen for Child Anxiety Related Emotional Disorders
School Environment & Support in School
SCM - Stattin Child Monitoring
Sicklist, somatic
SMFQ - Short Mood and Feelings Questionnaire (depression)
Spare Time Activities
Weight & Height
Go to data source
Opens in a new tabhttps://ki.se/en/research/research-infrastructure-and-environments/core-facilities-for-research/swedish-twin-registry-core-facility