Clinical diagnosis of severe COVID-19: A derivation and validation of a prediction rule

Table 5 Comparison of predictive performance between the proposed method and CURB-65

	Proposed model	CURB-65
Internal validation
AUROC	0.941 (0.901-0.981)	0.704 (0.564-0.863)
Precision	0.270 (0.234-0.307)	1.000
Sensitivity	0.930 (0.896-0.964)	0.156 (0.085-0.228)
Specificity	0.622 (0.602-0.641)	1.000
External validation
AUROC	0.936 (0.886-0.987)	0.654 (0.518-0.791)
Precision	0.413 (0.261-0.565)	0.481 (0.254-0.708)
Sensitivity	0.927 (0.873-0.980)	0.292 (0.186-0.399)
Specificity	0.804 (0.728-0.880)	0.954 (0.925-0.983)

AUROC: Area under the receiver operating curve.