Mild traumatic brain injury (mTBI) is a frequent cause of presentation to emergency
departments (EDs), accounting for 80% of all head injury cases [1,2]. The majority of people
with mTBI will make a full recovery within a couple of weeks or months [3]; however, a
proportion (5% to 12%) will suffer from persistent symptoms that can lead to difficulties in
returning to routine daily life such as work or school [4-6]. Of those who present to hospital,
around 80% are discharged directly from the ED [7]. As the ED is often the only medical
contact these people have, the care they receive has the potential to affect their outcome