Table 4.

Logistic regression modeling the need for SAE or failing nonoperative management, vs. successful observation: subset of patients with low grade I–III injury and absence of blush and splenic vascular injury (n=258)

Covariate	OR (95% CI)	P value
No HP	1.0 (Ref)	Ref
Small HP	0.68 (0.22 to 2.06)	0.49
Moderate HP	5.55 (2.07 to 14.82)	<0.001
Large HP	4.88 (1.23 to 19.40)	0.03
Age (10-unit increase)	1.40 (1.12 to 1.74)	0.003
Male sex vs. females	2.77 (1.03 to 7.40)	0.04
ISS (10-unit increase)	1.60 (1.04 to 2.46)	0.03
Blood type O vs. other	1.93 (0.85 to 4.36)	0.12
Abnormal RR vs. RR 12–20	1.28 (0.53 to 3.10)	0.59
Initial hemoglobin <10	0.47 (0.11 to 2.08)	0.32

Variables marginally associated in the univariate analysis (p<0.15) were included in the final multivariate logistic regression model. Model fit: AUROC: 0.80; r²=0.28. Bold values denote p<0.05.

AUROC, area under the receiver operating characteristic curve; HP, hemoperitoneum; ISS, injury severity score; SAE, splenic artery embolization.