Study Suggests People With Psychiatric Illness Tend to Partner With Each Other

Understanding how psychiatric illness is transmitted across families and generations holds tremendous importance for both identifying and treating people who may develop a mental disorder, while also helping to understand the evolutionary trajectory of mental illness. A study published yesterday in JAMA Psychiatry has offered a clue in this regard, suggesting that people with psychiatric conditions are more likely to pair up with others who have psychiatric conditions.Researchers from Karolinska Institutet in Sweden and the University of Carolina at Chapel Hill relied on population registers from Sweden to determine the nature and extent of nonrandom mating within and across psychiatric conditions, including attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, schizophrenia, bipolar disorder, major depression, generalized anxiety disorder, substance abuse, and more.For the purposes of comparison, cases of select nonpsychiatric conditions of similar incidence and age at onset were also identified, including Crohn’s disease, type 1 and type 2 diabetes mellitus, multiple sclerosis, and rheumatoid arthritis. Mating relationships were identified through marriage records or records of individuals being the biological parent of a child in other registers.On average, an individual’s psychiatric disorder was associated with a twofold to threefold increase in the likelihood that his or her mate would also have a psychiatric disorder, with slightly higher odds ...
Source: Psychiatr News - Category: Psychiatry Tags: assortive mating family history genetics heritability nonrandom mating Source Type: research