Lower birth weight as a risk factor for the development of attention deficit/hyperactivity disorder (ADHD) symptoms. Birth weight significantly predicted ADHD symptoms from early childhood to late adolescence. Our findings provide stringent evidence for environmental effect of lower birth weight on the causal pathway to elevated ADHD symptoms. Effect of birth weight persists across a 14‐year period from childhood into late adolescence, in particular for inattention symptoms.

https://onlinelibrary.wiley.com/doi/10.1111/jcpp.12949