Table 4

Adverse outcomes: multivariate analysis

Model	Variable	OR	95% CI	P value
Base	Age	1.071	1.035 to 1.108	<0.001
	ASA score	1.895	1.098 to 3.270	0.022
	Admission hemoglobin	0.998	0.838 to 1.188	0.979
	Antiplatelet pre-injury	1.535	0.871 to 2.706	0.138
	Time to surgical fixation (hrs)	1.013	1.002 to 1.024	0.023
	Lowest hemoglobin ≤7.1 and no blood transfusion	7.831	0.785 to 78.117	0.079
	Lowest hemoglobin ≤7.1 and blood transfusion	4.638	2.248 to 9.572	<0.001
	Lowest hemoglobin >7.1 and blood transfusion	2.631	1.144 to 6.049	0.023
Final	Age	1.072	1.037 to 1.108	<0.001
	ASA score	1.961	1.146 to 3.357	0.014
	Time to surgical fixation (hrs)	1.013	1.001 to 1.024	0.027
	Lowest hemoglobin ≤7.1 and no blood transfusion	8.518	0.882 to 82.314	0.064
	Lowest hemoglobin ≤7.1 and blood transfusion	4.785	2.543 to 9.005	<0.001
	Lowest hemoglobin >7.1 and blood transfusion	2.633	1.205 to 5.758	0.015

Hosmer and Lemeshow X²=5.228, p=0.733; c-statistic=0.776.
ASA score 1–5, where 1=minimal risk and 5=extreme risk of death with or without surgery.
ASA score, American Society of Anesthesiologists physical status classification system;