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Previous Volume 354:366-378 January 26, 2006 Number 4 Next

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ABSTRACT

Background Hospitals have difficulty justifying the expense of maintaining trauma centers without strong evidence of their effectiveness. To address this gap, we examined differences in mortality between level 1 trauma centers and hospitals without a trauma center (non–trauma centers).

Methods Mortality outcomes were compared among patients treated in 18 hospitals with a level 1 trauma center and 51 hospitals non–trauma centers located in 14 states. Patients 18 to 84 years old with a moderate-to-severe injury were eligible. Complete data were obtained for 1104 patients who died in the hospital and 4087 patients who were discharged alive. We used propensity-score weighting to adjust for observable differences between patients treated at trauma centers and those treated at non–trauma centers.

Results After adjustment for differences in the case mix, the in-hospital mortality rate was significantly lower at trauma centers than at non–trauma centers (7.6 percent vs. 9.5 percent; relative risk, 0.80; 95 percent confidence interval, 0.66 to 0.98), as was the one-year mortality rate (10.4 percent vs. 13.8 percent; relative risk, 0.75; 95 percent confidence interval, 0.60 to 0.95). The effects of treatment at a trauma center varied according to the severity of injury, with evidence to suggest that differences in mortality rates were primarily confined to patients with more severe injuries.

Conclusions Our findings show that the risk of death is significantly lower when care is provided in a trauma center than in a non–trauma center and argue for continued efforts at regionalization.

Source Information

From the Johns Hopkins Bloomberg School of Public Health, Center for Injury Research and Policy, Baltimore (E.J.M., K.P.F., B.L.E., D.S.S., D.O.S.); and the University of Washington School of Medicine, Harborview Injury Prevention and Research Center, Seattle (F.P.R., G.J.J., A.B.N.).

Address reprint requests to Dr. MacKenzie at Johns Hopkins Bloomberg School of Public Health, 624 N. Broadway, Rm. 554, Baltimore, MD 21205-1996, or at emackenz{at}jhsph.edu.

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