Table 1.

Agreement for the diagnosis of COVID-19 between the two radiologists (a), the two clinicians (b), and radiologists vs. clinicians (c).

(a)
			Second Radiologist
First Radiologist			0	1	2	Total
0 (negative for COVID-19)			23	0	0	23
1 (typical for COVID-19)			0	27	0	27
2 (indeterminate for COVID-19)			1	17	16	34
Total			24	44	16	84
(b)
			Second Clinician
First Clinician			0		1		Total
0 (likely COVID-19)			33		8		41
1 (unlikely COVID-19)			15		28		43
Total			48		36		84
(c)
		Radiologists
		1/1	1/0, 0/1, 1/2, 2/1		0/0, 2/0, 0/2, 2/2		Total
Clinicians	1/1	18	4		6		28
	1/0, 0/1	7	6		10		23
	0/0	2	7		24		33
	Total	27	17		40		84

(a) Substantial agreement: percent agreement 78.5% (95% CI: 68.0–86.4), Kappa 0.683 (95% CI: 0.560–0.806); (b) Moderate agreement: percent agreement 72.6% (95% CI: 61.6–81.5), Kappa 0.454 (95% CI: 0.267–0.642); (c) Fair agreement: percent agreement 57.1% (95% CI: 45.9–67.7), Kappa 0.341 (95% CI: 0.186–0.496).