In a mature trauma system, there is no difference in outcome (survival) between Level I and Level II trauma centers.
The state of Pennsylvania (PA) has one of the oldest, most well-established trauma systems in the country. The requirements for verification for Level I versus Level II trauma centers within PA differ minimally (only in the requirement for patient volume, residency, and research). We hypothesized that there would be no difference in outcome at Level I versus Level II trauma centers.
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