YATSS - Young Adult Twin Study in Sweden

A twin study on health and behavior in young adult twins born between 1985 and 1992 was conducted. The aim of the study was to examine how genetic and environmental factors influences diseases. The study included questions about gastrointestinal disorders, pulmonary disease, asthma/allergy, arthritis, affective disorders and symptoms, eating disorders , fibromyalgia, chronic fatigue syndrome and women's health. The sample consisted of both identical (monozygotic) and fraternal (dizygotic) twins, including same-sex and opposite-sex pairs. Conducted in 2013, the study had a total of 6,870 participants out of 16,244 invited. Participants were also asked to provide DNA samples via saliva for zygosity determination and genotyping. A total of 4,000 twins who participated in the YATSS survey were genotyped. The YATSS study includes the following question areas: ADHD Alcohol Allergy Autism Burnout CES-D - Center for Epidemiologic Studies Depression Scale -11 items, Iowa Form Chronic fatigue syndrome DCQ - Dysmorphic Concerns Questionnaire (BDD) - 7 items, swedish version Demography MDD - Major Depressive Disorder - 31 items Eatingdisorders Education and occupation Epilepsy EPQ - Eysenck Personality Questionnaire - 9 items Fibromyalgia GAD - Generalised Anxiety Disorder - 19 items Headache Hoarding - HRS-I (Hoarding Rating Scale-Interview) - 4 out of 5 items IBS - Irritable Bowel Syndrome Illicit drugs Medical history Menstruation och reproductive history OA & RA - Osteoarthritis and Rheumatoid arthritis OCD - Obsessive Cumpulsive Disorder - 12 items Physical activity Performance Psychosis Reflux Sexual risk behavior SIL - sick leave Sleep Smoking and snuff use Trauma Urinary tract infection Socio-economic index - classifation mainly based on information about individuals profession