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Mixed effects Poisson regression with robust error variance for patients requiring emergent OR/IR and who achieved hemostasis (n=408). Unadjusted models (A) control for study site as a random effect. Adjusted models (B) control for age, ISS, injury mechanism, time to OR/IR, treatment group, and admission base excess as fixed effects and study site as a random effect. *, statistically significant after modified Bonferroni correction.
