Logistic regression modeling the need for SAE or failing nonoperative management, vs. successful observation
| Covariate | OR (95% CI) | P value |
| No HP | 1.0 (Ref) | Ref |
| Small HP | 1.21 (0.46 to 2.76) | 0.80 |
| Moderate HP | 3.51 (1.49 to 8.26) | 0.004 |
| Large HP | 2.89 (1.03 to 8.06) | 0.03 |
| Age (10-unit increase) | 1.25 (1.06 to 1.49) | 0.01 |
| Male sex vs. females | 1.55 (0.76 to 3.17) | 0.23 |
| ISS (10-unit increase) | 1.39 (0.96 to 2.00) | 0.08 |
| Blood type O vs. other | 1.60 (0.83 to 3.07) | 0.16 |
| Abnormal RR vs. RR 12–20 | 1.82 (0.90 to 3.71) | 0.10 |
| Blush vs. not | 1.39 (0.62 to 3.14) | 0.43 |
| Splenic vascular injury vs. not | 5.88 (1.12 to 30.99) | 0.04 |
| Initial hemoglobin <10 | 0.52 (0.16 to 1.75) | 0.29 |
| BSI grade (continuous) | 2.41 (1.68 to 3.47) | <0.001 |
Variables marginally associated in the univariate analysis (p<0.15) were included in the final multivariate logistic regression model. Model fit: AUROC: 0.87; r2=0.47. Bold values denote p<0.05.
AUROC, area under the receiver operating characteristic curve; BSI, blunt splenic injury; HP, hemoperitoneum; ISS, injury severity score; RR, respiratory rate; SAE, splenic artery embolization.