TABLE 1.

Chest computed tomography (CT) results stratified by RT-PCR results

	Initial RT-PCR: positive	Initial RT-PCR: negative/non-interpretable
Chest CT: CO-RADS 1–2 (COVID-19 unlikely)	3 2.7% (95% CI 0.0–7.3%)	65# 51.2% (95% CI 42.5–60.6%)	68
Chest CT: CO-RADS 3 (COVID-19 indeterminate)	5 4.5% (95% CI 0.9–9.1%)	24¶ 18.9% (95% CI 10.2–28.3%)	29
Chest CT: CO-RADS 4–5 (COVID-19 likely)	104 92.9% (95% CI 89.3–97.5%)	38+ 29.9% (95% CI 21.3–39.3%)	142
	112 (100%)	127 (100%)	239

Data are presented as n % (95% CI), unless otherwise stated. ^#: there were no “non-interpretable” initial RT-PCR results; 22 patients had at least one repeat RT-PCR, of which one was positive; ^¶: one initial RT-PCR result was “non-interpretable”; 20 patients had at least one repeat RT-PCR, of which none were positive; ⁺: seven initial RT-PCR results were “non-interpretable”; 35 patients had at least one repeat RT-PCR, of which 13 were positive.