Comparing people with persisting post-concussion symptoms from an emergency department-based research sample with patients in a clinical rehabilitation sample: an explorative, retrospective analysis

Treatment-seeking patients with persisting post-concussion symptoms differed in clinically important ways from people who developed persisting post-concussion symptoms in an emergency department-based mild traumatic brain injury study. Results from studies of mild traumatic brain injury seen in the emergency department may not generalize to patients seeking specialized treatment for persisting post-concussion symptoms.