CATSS15 - The Child and Adolescent Twin Study in Sweden (15 years)

Patrik Magnusson

CATSS15 - The Child and Adolescent Twin Study in Sweden (15 years)

CATSS overview: The Child and Adolescent Twin Study in Sweden (CATSS) is an ongoing longitudinal twin study targeting all twins born in Sweden since July 1, 1992. Since 2004, parents of twins are interviewed regarding the children's somatic and mental health and social environment in connection with their 9th birthday (CATSS-9). At age 15 (CATSS15) and 18 (CATSS18), twins and parents complete questionnaires that, in addition to assessments of somatic and mental health, include 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. CATSS15: CATSS15 started in 2010. The study includes all 15-year-old twins and their parents, regardless of whether they participated in CATSS9 or not. The response rate for the parent survey is 53% and for the twin survey it is 49%. The sample consists of 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) in CATSS15 is currently 23,100 out of 39,300 invited (December 2024). The combined response rate is currently 58%. Participants who have not already provided a DNA sample via saliva are requested to do so again. The saliva sample is used for zygosity determination and genotyping. The number of genotyped twins in CATSS15 is currently 14,800 (December 2024). The question areas in the CATSS15 surveys are listed below. For detailed information about variables, visit strdata.se Question areas in parent survey: Administrative Information AUDIT - Alcohol Use Disorders Identification Test CMRS - Child Mania Rating Scale CMO - Child Monitoring DUDIT - Drug Use Disorders Identification Test LSC-R - Life Stressor Checklist- Revised PCR - Parent Child Relationship PPCP - Parents' Perception of Child's Peers PLE - Psychotic-like Experiences Somatic diseases Spare time activites SDQ - Strength and Difficulties Questionnaire Question areas in twin survey: CMRS - Child Mania Rating Scale DCQ - Dysmorphic Concerns Questionnaire EDI-2 - Eating Disorder Inventory - 2 HRS-I - Hoarding Rating Scale-Interview Physical acitivity PMS PLE - Psychotic-like Experiences Quality of Friendship RPQ - Reactive and Proactive Aggression Questionnaire OBVQ - Revised Olweus Bully/Victim Questionnaire SRD - Self-Reported Delinquency Self-Reported Alcohol and Drug Use Sexuality Somatic diseases SDQ - Strength and Difficulties Questionnaire TCI - Temperament and Character Inventory Tics Weight and height

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https://ki.se/en/research/research-infrastructure-and-environments/core-facilities-for-research/swedish-twin-registry-core-facility

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Method and outcome

Data collection - Self-administered questionnaire

Mode of collection:

Self-administered questionnaire

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Paper or web questionnaire

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2010-03 - Ongoing

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Karolinska Institutet
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Source of the data:

Registers/Records/Accounts: Medical/Clinical
Registers/Records/Accounts

Instrument

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SDQ

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Structured questionnaire

Description of the instrument:

Strengths and Difficulties Questionnaire (SDQ) is an assessment method used to measure the mental health of children and young people. The form is based on experiences from two other established and internationally widespread instruments ,the Rutter questionnaire and the Child Behavior Checklist (CBCL). DOI: 10.1111/j.1469-7610.1997.tb01545.x

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RPQ

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Structured questionnaire

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The Reactive-Proactive Aggression Scale (RPQ) is a self-report measure of two main forms of aggression – proactive and reactive DOI:10.1002/ab.20115.

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DCQ

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Structured questionnaire

Description of the instrument:

Dysmorphic Concerns Questionnaire (DCQ) is a self-report measure with seven items which ask about cognitive and behavioural aspects of dysmorphic concern. It has been validated as a screening tool for body dysmorphic disorder. DOI: 10.3109/00048679809062719 DOI: 10.1046/j.1440-1614.2001.00860.x DOI: 10.3109/00048671003596055

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EDI-2

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Structured questionnaire

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The Eating Disorder Inventory (EDI) is a self-report questionnaire used to assess the presence of eating disorders. DOI:10.1002/1098-108X(198321)2:23.0.CO;2-6 DOI: 10.1080/08039480500504537

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LSC-R

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Structured questionnaire

Description of the instrument:

The Life Stressor Checklist-Revised (LSC-R) is a self-report measure that assesses traumatic or stressful life events. DOI: 10.1017/S0033291711003060

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PLE

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Structured questionnaire

Description of the instrument:

Psychotic like experiences (PLE) - Five items adapted from the Diagnostic Interview Schedule for Children (DIS-C) to screen for psychotic-like experiences in children. DOI:10.1016/j.schres.2006.11.006

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TCI

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Structured questionnaire

Description of the instrument:

The Temperament and Character Inventory (TCI) is a self-report personality questionnaire based on Cloninger's psychobiological model of personality DOI: 10.1001/archpsyc.1993.01820240059008 DOI: 10.1016/0959-4388(94)90083-3 DOI:10.1027/1015-5759.24.1.14 DOI: 10.1016/s0010-440x(98)90070-0

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OBVQ

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Structured questionnaire

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Revised Olweus Bully/Victim Questionnaire (Perpetrator + Victim, OBVQ-R) is a self-report questionnaire with 42 items, which has been used in different countries, and has adequate psychometric properties to assess the prevalence of victimization and aggression and various forms of bullying worldwide. This version uses 24 of the items. DOI:10.1007/BF02195509 DOI:10.1348/000709905X53499

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HRSI

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Structured questionnaire

Description of the instrument:

Hoarding Rating Scale-Interview (HRS-I) is a five-item semi-structured interview that assesses the features of compulsive hoarding (clutter, difficulty discarding, acquisition, distress and impairment). DOI: 10.1016/j.psychres.2009.05.001

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AUDIT

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Structured questionnaire

Description of the instrument:

Alcohol Use Disorders Identification Test (AUDIT) is an instrument used to identify risky and harmful alcohol consumption. The instrument was originally developed by the World Health Organization (WHO). The questions are asked in the parent survey and addresses the parent's own drug consumption. DOI: 10.15288/jsa.1995.56.423 DOI: 10.1093/alcalc/37.3.245 DOI:10.1111/j.1530-0277.1997.tb03811.x DOI: 10.1111/j.1360-0443.1993.tb02093.x

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DUDIT

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Structured questionnaire

Description of the instrument:

Drug Use Disorders Identification Test (DUDIT) is an 11-item self-administered screening instrument for drug-related problems, giving information on the level of drug intake and selected criteria for substance abuse/harmful use and dependence according to the ICD-10 and DSM-4 diagnostic systems. The questions are asked in the parent survey and addresses the parent's drug consumption. DOI: 10.1159/000081413

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str-research@meb.ki.se

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Version 1

Karolinska Institutet

CATSS15 - The Child and Adolescent Twin Study in Sweden (15 years)

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