Figure 1.

Overview of patient cohort and transfer network. (A) Number of compartments affected by traumatic and non-traumatic intracranial hemorrhage. (B) Intracranial hemorrhage prevalence by bleed compartment. (C) Patient disposition following initial hospital presentation. (D) Locations and patient sending frequency of hospitals in Massachusetts. (E) Locations and patient receiving frequency of hospitals in Massachusetts. (F) Distribution of intracranial hemorrhage characteristics and trauma status for transferred versus admitted patients.