Table 3.

2 × 2 contingency table comparing the two areas (infected and clean) of ED with patients affected by COVID-19

	Infected by COVID-19	Non-infected by COVID-19
Infected area	92	90
Clean area	9	1831
Sensitivity	91.1% (88.3–93.3)
Specificity	95.3% (94.8–95.7)
NPV	99.5% (99.3–99.6)
PPV	50.5% (43.2–57.7)
Accuracy	90.5% (89.8–91.1)

NPV Negative Predictive Value; PPV Positive Predictive Value