Table 3.

Performance of the BATT score

	BATT score	95% CI
Overall performance
Brier score	0.0107
Scaled Brier score (%)	6
Discrimination
C-statistic	0.90	0.89–0.91
Mean predicted death due to bleeding (%)
If patient died from bleeding	6.5
If patient did not die from bleeding	1.1	1.1–1.1
Discrimination slope (%)	5.4	0.053–0.056
Calibration
Observed deaths due to bleeding (%)	1.16	1.1–1.2
Predicted deaths due to bleeding (%)	1.15	1.1–1.2
Calibration-in-the-large (%)	0.01	0.00–0.01
Ratio Predicted/Observed	0.99	0.94–1.05
Calibration Intercept	0.00032
Calibration slope	1.09	1.07–1.11