Table 4.

Normalized importance of components in multilayer perceptron networks predicting severe bleeding and the need for surgical intervention.

Outcome predictors	Normalized importance, %
Severe bleeding
Hemoglobin (g/dL) on admission	100
Systolic blood pressure on admission (mm Hg)	83
Outpatient prescription for aspirin 325 mg daily	60
Charlson comorbidity index	30
Base deficit ≥5 mEq/L on admission	24
International normalized ratio ≥ 1.5 on admission	13
Need for surgical intervention
Nadir hemoglobin (g/dL)	100
Systolic blood pressure on admission (mm Hg)	86
Decrease in hematocrit by 20% within 24 h	28
Outpatient prescription for aspirin 325 mg daily	17
Charlson comorbidity index	10