Table 2. Sensitivity, specificity, positive predictive value and negative predictive value of ULD chest CT acquisitions obtained by the senior (radiologist 1) and junior (radiologist 2) radiologists for viral pneumonia detection.

ULD performance	Radiologist 1	Radiologist 2
Sensitivity (95% CI)	98.9% (93.5%; 100.0%)	98.9% (93.5%; 100.0%)
Specificity (95% CI)	99.0% (96.8%; 99.8%)	97.6% (94.9%; 98.9%)
Positive predictive value (95% CI)	96.9% (93.4%; 100.0%)	92.9% (87.9%; 98.0%)
Negative predictive value (95% CI)	99.6% (99.0%; 100.0%)	99.6% (98.9%; 100.0%)

Outcomes obtained from STD chest CT acquisitions were used as reference. ULD, ultra-low-dose; STD, standard; CT, computed tomography.