What is the estimated genetic heritability for Adult ADHD?

The estimated genetic heritability for Adult ADHD is often cited to be around 70%. This figure indicates that a significant proportion of the variation in ADHD symptoms can be attributed to genetic factors, highlighting the strong hereditary component of the disorder. Research in genetics has shown that individuals with a family history of ADHD are more likely to be diagnosed with the condition themselves. This heritability estimate is derived from studies that examine the prevalence of ADHD in twins and families, showing that genetic influences play a critical role in its development.

A heritability estimate of 70% suggests that while environmental factors do contribute to the expression of ADHD, genetics is a predominant factor. Therefore, understanding this heritability can inform treatment approaches and interventions, as well as guide research into potential genetic markers associated with the disorder.