Table 3.

Discrimination statistic of the reverse-transcription polymerase chain reaction (RT-PCR) alone and RT-PCR associated with COVID-19 Reporting and Data System (CO-RADS) score and the ability to predict the final diagnosis of COVID-19.

	NRI (95% CI)	NRI events, %	NRI non-events, %	AUC
RT-PCR (reference)				83.9%
CO-RADS application	1.478 (1.394–1.901)	65.6%	82.1%	98.8%

NRI, continuous net reclassification improvement; IDI, integrated discrimination improvement; AUC, area under the receiver operating characteristic curve.