CATSS9 - The Child and Adolescent Twin Study in Sweden (9 years, telephone interview)

Patrik Magnusson

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

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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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Documentation files

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Method and outcome

Data collection - Telephone interview

Mode of collection:

Telephone interview

Description of the mode of collection:

Telephone interview

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2004-10-01 - 2020-06-30

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Karolinska Institutet
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Registers/Records/Accounts: Medical/Clinical
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SMFQ

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Structured questionnaire

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The Short Mood and Feelings Questionnaire (SMFQ) is based on the Mood and Feelings Questionnaire (MFQ) which was developed by Adrian Angold and Elizabeth J. Costello in 1987. The questionnaire consists of a series of descriptive phrases regarding how the subject has been feeling or acting recently. Codings reflect whether the phrase was descriptive of the subject most of the time, sometimes or not at all in the past two weeks. DOI: 10.1097/00004583-198811000-00011 Angold, A., Costello, E. J., Messer, S. C., & Pickles, A. (1995). Development of a short questionnaire for use in epidemiological studies of depression in children and adolescents. International Journal of Methods in Psychiatric Research, 5(4), 237–249.

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SCARED

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Structured questionnaire

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The Screen for Child Anxiety Related Emotional Disorders (SCARED) is a widely used instrument designed to screen for anxiety disorders in children and adolescents. DOI: 10.1097/00004583-200503000-00013 DOI: 10.1007/s10578-018-0854-0

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A-TAC

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Structured questionnaire

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Autism-Tics, ADHD and other Comorbidities (A-TAC) is a telephone interview developed for use in CATSS (Child and Adolescent Twin Study in Sweden). It is a comprehensive screening tool designed to identify a range of neuropsychiatric variations in children, particularly for the assessment of autism, ADHD, DCD, and learning difficulties. DOI: 10.1186/s12888-017-1563-0

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SCM

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Stattin Child Monitoring (SCM): Questions covering three potential sources of information - child disclosure (CD), parental solicitation, and parental control DOI: 10.1037//0012-1649.36.3.366 DOI: 10.1111/1467-8624.00210

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CPTI

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Structured questionnaire

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The Child Problematic Traits Inventory (CPTI) is a 28 item questionnaire aimed to assess psychopathic personality traits in children age 3 to 12 years. It is a research instrument with the purpose to facilitate research on the role of psychopathic traits in development. DOI: 10.1007/s10862-013-9385-y DOI: 10.1177/1073191119832654

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LSC-R

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The Life Stressor Checklist-Revised (LSC-R) is a self-report measure that assesses traumatic or stressful life events. https://www.ptsd.va.gov/professional/assessment/documents/LSC-R.pdf DOI: 10.1037/t04534-000

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PTSD

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Structured questionnaire

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DSM-IV Diagnostic criteria for Post Traumatic Stress Disorder (PTSD) include a history of exposure to a traumatic event and symptoms from each of three symptom clusters: intrusive recollections, avoidant/numbing symptoms, and hyper-arousal symptoms. A fifth criterion concerned duration of symptoms; and, a sixth criterion stipulated that PTSD symptoms must cause significant distress or functional impairment. DOI: 10.1176/appi.books.9780890425596

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str-research@meb.ki.se

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Version 1

Karolinska Institutet

CATSS9 - The Child and Adolescent Twin Study in Sweden (9 years, telephone interview)

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Standard för svensk indelning av forskningsämnen 2025:

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