“…For this study, cases were assigned a TBI code if the patient received either a (1) diagnosis code for concussion, (2) a body part code for head with a diagnosis code for fracture, or (3) a body part code for head with a diagnosis code for internal injury. 13 The locale where the injury occurred was categorized as sports or recreational place, school, home (home, farm, or mobile home), or other (street/highway, other public property, or industrial place). Case disposition was categorized as hospitalized (treated and admitted for hospitalization, treated and transferred to another hospital, or held for observation) or not hospitalized (treated and released, examined and released without treatment, or left without being seen/left against medical advice).…”