Egyptian Journal of Radiology and Nuclear Medicine

Table 4 Interobserver preference agreement

From: Validation of imaging reporting and data system of coronavirus disease 2019 lexicons CO-RADS and COVID-RADS with radiologists’ preference: a multicentric study

		Observer 1		Κ value^a
		COVID-RADS	CO-RADS	Κ value^a
Observer 2	COVID-RADS	738 (74.5%)	10 (1%)	0.86 (0.69–0.95)
Observer 2	CO-RADS	40 (4%)	203 (20.5%)	P < 0.001
Observer 3	COVID-RADS	716 (72.3%)	11 (1.1%)	0.80 (0.61–0.93)
Observer 3	CO-RADS	62 (6.3%)	202 (20.4%)	P < 0.001
		Observer 2		Κ value^a
		COVID-RADS	CO-RADS	Κ value^a
Observer 3	COVID-RADS	726 (73.3%)	1 (0.1%)	0.94 (0.79–0.99)
Observer 3	CO-RADS	22 (2.2%)	242 (24.4%)	P < 0.001

^aFleiss Κ value and 95% CI (confidence interval)

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