This article seeks todetermine whether rates of dementia were associated with average altitude of residence in 58 California counties.
This cross-sectional study using a sample of twins/siblings reports that differences in amygdala volume in cannabis users are attributable to common predispositional factors, genetic or environmental in origin, with little support for causal influences of cannabis use.
This population-based cohort study of children with autism confirms previous findings that children born by cesarean section are approximately 20% more likely to be diagnosed as having autism, although this association is likely due to familial confounding.
This cohort study using 8 public data registers reports that parent-offspring transmission of alcohol use disorder results from both genetic and environmental factors.
Ljung et al explore whether attention-deficit/hyperactivity disorder (ADHD) and suicidal behavior share genetic and environmental risk factors.
Monzani et al estimate the degree to which genetic and environmental risk factors are shared and/or unique to dimensionally scored obsessive compulsive disorder, body dysmorphic disorder, hoarding disorder, trichotillomania (hair-pulling disorder), and excoriation (skin-picking) disorder.
Reichborn-Kjennerud et al determine the structure of genetic and environmental risk factors for the symptoms of borderline personality disorder.
To provide estimates of familial risk for and heritability of obsessive-compulsive disorder
(OCD), Mataix-Cols et al performed population-based, multigenerational, case-control family and twin
studies using Swedish registries. Included were all individuals diagnosed as having OCD between 1969
and 2009 and their available relatives.