Table 5.

Comparison of discrimination, calibration, reclassification metrics and clinical usefulness between CURB-65 and modified CURB-65

	CURB-65	Modified CURB-65
Discrimination
AUC	0.76 (95% CI 0.72 to 0.80)	0.77 (95% CI 0.72 to 0.81)
Calibration
Hosmer-Lemeshow test and calibration plot	Good	Good
Reclassification
Overall category-free NRI	0.387 (95% CI 0.193 to 0.582, p<0.0001)
Overall IDI	0.015 (95% CI 0.004 to 0.027, p<0.01)
Clinical usefulness
NB examined by DCA	Comparable

AUC, area under the receiver operating characteristic curve; DCA, decision curve analysis; IDI, integrated discrimination improvement; NB, net benefit; NRI, net reclassification improvement.