TABLE II.

Adjusted Mortality Effect (Trauma Center vs. Nontrauma Center) by OTA Classification^*

Outcomes	Relative Risk (95% CI)
Hospital death
All subjects	1.39 (0.59-3.28)
Pelvis only	1.89 (0.75-4.76)
Acetabulum only	2.20 (0.26-18.63)
Combined injury	0.51 (0.15-1.72)
Death within 90 days
All subjects	0.96 (0.64-1.46)
Pelvis only	1.18 (0.60-2.31)
Acetabulum only	4.04 (0.53-30.86)
Combined injury	0.34 (0.14-0.82)
Death within 1 year
All subjects	0.67 (0.44-1.01)
Pelvis only	0.71 (0.43-1.16)
Acetabulum only	5.80 (0.80-42.01)
Combined injury	0.30 (0.14-0.68)

^*Among total cohort of patients with pelvic injuries (weighted number of patients = 1727), acetabular injuries (weighted number of patients = 297), or combined injuries (weighted number of patients = 620). Values calculated with use of a propensity score-based adjustment model including the following covariates: all demographic and injury characteristics listed in Table I as well as ED (emergency department) first shock, first ED assessment of pupils, midline shift, flail chest, open skull fracture, obesity, and paralysis along with relevant two-way interaction terms.