By the DSM-IV definition, the term ADHD includes both ADHD with hyperactivity (the H in ADHD) and ADHD without hyperactivity.

NPR: Excerpt: 'Delivered from Distraction'

Adults with attention deficit hyperactivity order (ADHD) do not get enough support from the NHS, a support group has claimed.

BBC: ADHD Oxfordshire support group criticises NHS

It is believed that sleep deprivation may harm neurological development and can contribute to behavioural problems including attention deficit hyperactivity disorder (ADHD).

BBC: Children losing out on sleep