In a study published in Sports Health, Master et al. found that the existence of pre-injury mental health diagnoses correlated with longer concussion recovery time and increased emotional symptoms.

In a study presented at the American Neurological Association annual meeting, researcher Catherine M. McDonald, PhD, RN, FAAN, found that many adolescents with concussions return to driving sooner than might be safe. Robert Herpen, in an article for Helio, notes, “Those with concussion had more trouble with decision-making and reaction times than those without.”