Table 2.

Accuracy, sensitivity and specificity of the CART risk model, CURB-65 score and SOAR score.

	New decision tree	CURB-65 score	SOAR score
ROC curve
AUC	0.661	0.608	0.589
Sensitivity	73.4%	74.5%	80.7%
Specificity	49.0%	42.3%	33.9%
ROC curve with smoothing
AUC	0.667	0.612	0.611
Sensitivity	67.7%	65.0%	64.4%
Specificity	56.6%	51.2%	51.7%

Sensitivity and specificity cut-off point was calculated using Youden’s J statistic.