Table 3

Logistic regression on factors associated with additional intervention (surgery or SAE) after NOM or SAE

Initial strategy (n=3308/831)Initial NOM strategy that required later interventionInitial SAE strategy that required later intervention
CharacteristicOR95% CIP valueOR95% CIP value
NTDB cohort (vs Stanford/SCVMC)4.581.42 to 14.60.010*1Omitted_
Age 18–25 years0.490.29 to 0.830.008*___
Age 26–35 years0.690.43 to 1.090.118___
Age 36–49 years0.770.49 to 1.220.267___
Age 50–64 years0.950.62 to 1.450.805___
Age 65+ years1Reference____
Race—N/A1.090.41 to 2.940.857___
Race—other0.740.41 to 1.350.324___
Race—Asian1.650.68 to 4.040.272___
Race—black1.110.71 to 1.730.646___
Race—white1Reference____
Comorbidity (one)2.151.52 to 3.040.000*___
Comorbidity (two+)2.271.57 to 3.280.000*___
Comorbidity (none)1Reference____
Mechanism—motor vehicle0.560.36 to 0.850.007*___
Mechanism—motorcycle0.570.34 to 0.970.040*___
Mechanism—fall0.670.42 to 1.040.077___
Mechanism—pedestrian0.730.39 to 1.380.329___
Mechanism—bicycle0.230.05 to 0.980.047*___
Mechanism—blunt other1Reference____
Spleen AIS III0.410.25 to 0.650.000*0.420.16 to 1.070.068
Spleen AIS IV0.630.39 to 1.030.0660.700.33 to 1.490.355
Spleen AIS V1Reference_1Reference_
ISS—9–150.640.41 to 0.980.040*___
ISS—16–240.930.66 to 1.290.661___
ISS ≥251Reference____
Shock Index (<0.5)0.880.49 to 1.580.6931Omitted_
Shock Index (0.5–0.9)0.970.71 to 1.330.8600.440.26 to 0.740.002*
Shock Index (>0.9)1Reference_1Reference_
Blood 24 hours (0–2 units)12.10.33 to 4490.1770.010.00 to 0.310.007*
Blood 24 hours (3–9 units)13.90.39 to 5020.1490.060.03 to 1.040.053
Blood 24 hours (10+ units)1Reference_1Reference_
Plasma 24 hours (0–2 units)0.030.00 to 1.210.063___
Plasma 24 hours (3–9 units)0.040.00 to 1.640.089___
Plasma 24 hours (10+ units)1Reference____
Anticoagulant history1.060.54 to 2.080.8550.570.16 to 2.040.391
Any abdominal injury AIS ≥31.220.83 to 1.790.3151.710.83 to 3.520.144
  • *Statistically significant, only selected variables shown.

  • AIS, Abbreviated Injury Scale; ISS, Injury Severity Score; N/A, not available; NOM, non-operative management; NTDB, National Trauma Data Bank; SAE, splenic angioembolization; SCVMC, Santa Clara Valley Medical Center.