CATSS24 - The Child and Adolescent Twin Study in Sweden (24 years)

Patrik Magnusson

CATSS24 - The Child and Adolescent Twin Study in Sweden (24 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 (CATSS9). 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. CATSS24: CATSS24 started in 2016. The study includes all 24-year-old twins, regardless of whether they participated in earlier CATSS-studies or not. The sample consists of both identical (monozygotic) and fraternal (dizygotic) twins, including same-sex and opposite-sex pairs. The total number of twins participating in CATSS24 is currently 11,600 out of 21,900 invited (December 2024). The response rate is 53%. 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 CATSS24 is currently 7,300 (December 2024). The question areas in the CATSS24 survey are listed below. For detailed information about variables, visit strdata.se. AUDIT - Alcohol Use Disorders Identification Test CES-D - Center for Epidemiologic Studies Depression Scale DUDIT - Drug Use Disorders Identification Test DCQ - Dysmorphic Concerns Questionnaire HADS - Hospital Anxiety and Depression Scale HRS-I - Hoarding Rating Scale-Interview LHA - Life History of Aggression OCI-R - Obsessive-Compulsive Inventory-Revised PLE - Psychotic-like Experiences EDI-2 - Eating Disorder Inventory-2 Zygosity Premenstrual syndrome Suicidal thoughts/attempts Asthma and allergies FFQ2020 - Food Frequency Questionnaire (updated version)

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https://strdata.se

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Documentation files

Citation and access

Method and outcome

Data collection - Self-administered questionnaire

Mode of collection:

Self-administered questionnaire

Description of the mode of collection:

Paper or web questionnaire

Time period(s) for data collection:

2016-11 - Ongoing

Data collector:

Karolinska Institutet
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Source of the data:

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

Instrument

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LHA

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Structured questionnaire

Description of the instrument:

LHA (Life History of Aggression) is a widely used instrument which aims to measure trait aggression and antiscocial behavior. LHA consists of 11 items divided into three subscales: agression, self-directed aggression and consequences/antisocial behavior. DOI: 10.1016/s0165-1781(97)00119-4

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Suicide

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Structured questionnaire

Description of the instrument:

Six questions to assess the prevalence of sucidal thoughts and attempted suicide. DOI: 10.1176/ajp.149.1.41

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CESD

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Structured questionnaire

Description of the instrument:

The Center for Epidemiologic Studies Depression Scale Revised (CESD-R) is used to rate how often respondents have experienced symptoms associated with depression over the past week, such as restless sleep, poor appetite, and loneliness. DOI: 10.1016/j.psychres.2010.08.018

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HADS

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Structured questionnaire

Description of the instrument:

Hospital Anxiety and Depression Scale (HADS) is a self-report questionnaire designed to measure anxiety and depression in patients within somatic care. The scale is used to assess and/or detect changes in anxiety and depressive symptoms in patients outside psychiatric care. DOI: 10.1111/j.1600-0447.1983.tb09716.x

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DCQ

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Structured questionnaire

Description of the instrument:

Dysmorphic Concerns Questionnaire (DCQ) is a self-report questionnaire consisting of seven items designed to assess cognitive and behavioral aspects of dysmorphic disorder. It has been validated as a screening tool for body dysmorphic disorder (BDD). DOI: 10.3109/00048679809062719 DOI: 10.1046/j.1440-1614.2001.00860.x DOI: 10.3109/00048671003596055

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EDI-2

Type:

Structured questionnaire

Description of the instrument:

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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HRSI

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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OCI-R

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Structured questionnaire

Description of the instrument:

The Obsessive–Compulsive Inventory (OCI) is a self-report measure for assessing symptoms of obsessive–compulsive disorder (OCD). In this questionnaire a shortened version is used, OCI-R. DOI.10.1037/1040-3590.14.4.485

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PLE

Type:

Structured questionnaire

Description of the instrument:

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

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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). 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

Type:

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. DOI: 10.1159/000081413

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FFQ2020

Type:

Structured questionnaire

Description of the instrument:

An updated version of the Food Frequency Questionnaire (FFQ), used to monitor dietary habits. DOI: 10.1186/s12937-024-00984-8

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str-research@meb.ki.se

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Version 1

Karolinska Institutet

CATSS24 - The Child and Adolescent Twin Study in Sweden (24 years)

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