Table 4.

Sensitivity and specificity of CT when PCR is considered as gold standard test; PPV: positive predictive value, NPV: negative predictive value

CT	Early stage COVID-19	Progressive stage COVID-19	Total COVID-19
Sensitivity 95% CI	50.00% 35.53–64.47%	100.00% 93.28–100.00%	75.73% 66.29–83.64%
Specificity 95% CI	93.33% 83.80–98.15%	93.33% 83.80–98.15%	93.33% 83.80–98.15%
PPV 95% CI	86.21% 69.97–94.37%	92.98% 83.72–97.16%	95.12% 88.26–98.06%
NPV 95% CI	69.14% 62.74–74.87%	100.00%	69.14% 61.27–76.03%
Accuracy 95% CI	73.64% 64.38–81.58%	96.46% 91.18–99.03%	82.21% 75.46–87.75%