Table 2.

Statistical Comparison of SARS-CoV-2 Testing Methods

Statistic	H-PCR vs L-PCR	H-PCR vs X-ray	H-PCR vs B-PCR	B-PCR vs X-ray
Sensitivity	0.94 (0.82–1.0)	0.66 (0.49–0.82)	0.89 (0.74–1.0)	0.50 (0.33–0.67)
Specificity	0.80 (0.68–0.93)	0.95 (0.87–1.0)	0.82 (0.70–0.94)	0.96 (0.87–1.0)
Positive predictive value	0.65 (0.46–0.85)	0.95 (0.86–1.0)	0.69 (0.51–0.88)	0.94 (0.82–1.0)
Negative predictive value	0.97 (0.91–1.0)	0.67 (0.51–0.83)	0.94 (0.86–1.0)	0.58 (0.42–0.74)
McNemar test	χ12 = 5.42; P = 0.02	χ12 = 8.33; P = 0.01	χ12 = 2.78; P = 0.10	χ12 = 13.2; P = 0.001

Data are expressed as statistic estimates (95% CI).

B-PCR, bubbler PCR; H-PCR, hospital PCR; L-PCR, laboratory PCR.