CATSS18 - The Child and Adolescent Twin Study in Sweden (18 years)
CATSS18 - The Child and Adolescent Twin Study in Sweden (18 years)
Overview CATSS
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. Since 2004, parents of twins have been interviewed about the children's somatic and mental health and social environment in connection with their 9th birthday (CATSS9). At ages 15 (CATSS15) and 18 (CATSS18), twins and parents complete a web questionnaire that, in addition to assessments of somatic and mental health, includes measures of personality development and psychosocial adaptation. At the age of 24 (CATSS24), only twins participate in a web survey that mainly focuses on mental health.
CATSS18:
CATSS18 started in 2011. The study includes all 18-year-old twins and their parents, regardless of their participation in CATSS9 or CATSS15. The response rate is 50% for the twin survey and 40% for the parent survey. The sample comprises both identical (monozygotic) and fraternal (dizygotic) twins, including same-sex and opposite-sex pairs. The total number of participating twins (through parent and/or twin participation) is currently 20,400 out of 35,800 invited twins (December 2024). The combined response rate is 57%. Participants who have not yet provided a DNA sample via saliva are requested to do so. The saliva sample is used for zygosity determination and genotyping. Currently, 12,700 twins have been genotyped in CATSS18 (December 2024).
The question areas in the CATSS18 surveys are listed below. For detailed information about variables, visit strdata.seOpens in a new tab.
Question areas in parent survey:
ABCL - Adult Behavior Checklist
A-TAC - Autism - Tics, ADHD and other Comorbidities inventory (only Autism-questions)
Demography
Asthma
Eating disorders
LEC - Life Events Checklist
LSC-R - Life Stressor Checklist
MDQ - Mood Disorder Questionnaire
PCR - Parent Child Relationship
PPCP - Parents' Perception of Child's Peers
PLE - Psychotic-like Experiences
Parents physical activity
Social Interventions
Spare Time Activities
Question areas in twin survey:
AUDIT - Alcohol Use Disorders Identification Test
A-TAC - Autism - Tics, ADHD and other Comorbidities inventory (only Autism-questions)
BOCS - Brief Obsessive Compulsive Scale
CES-D - Center for Epidemiologic Studies Depression Scale
CMRS- Child Mania Rating Scale
Demography
DAWBA - Development and Well-Being Assessment
DUDIT - Drug Use Disorders Identification Test
DSM-IV Criteria for Major Depressive Episode
DCQ - Dysmorphic Concerns Questionnaire
EDI-2 - Eating Disorder Inventory - 2
Friends' Behavior
HRS-I - Hoarding Rating Scale-Interview
LEC - Life Events Checklist
LHA - Life History of Aggression
LSC-R - Life Stressor Checklist- Revised
Love Relationship
MDQ - Mood Disorder Questionnaire
Nicotine Use
PCR - Parent Child Relationship
Phobias
Physical Activity
PLE - Psychotic-like Experiences
Premenstrual syndrome
Quality of Friendship
SCARED - Screen for Child Anxiety Related Emotional Disorders
SRD - Self-Reported Delinquency
Sexuality
Social Interventions
Spare Time Activities
Synesthesia
TCI - Temperament and Character Inventory
YPI - Youth Psychopathic Traits Inventory
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