Fig. 4

Decision curve analysis of the models for predicting massive hemorrhage in trauma. a: model 1; b: model 2. The y-axis measures the net benefit. The x-axis represents the threshold probability. The red line represents the model’s decision curve. The “All” line represents the assumption that all patients have a massive hemorrhage. The “None” line represents the assumption that no patients have a massive hemorrhage. The further the model’s decision curve is from the “All” and “None” reference lines, the higher the net benefit of the model at the same threshold probability