Table 1.

Four‐field table of PCR‐positive tested patients for C _t values ≤30

AG‐test/PCR	PCR+	PCR−	Total
Ag+	367	8	375
Ag−	89	1816	1905
	456	1824	2280

Note: Sensitivity: 80.48%; specificity: 99.56%; NPV: 0.95; PPV: 0.97.

Abbreviations: C _t, threshold value; NPV, negative predictive value; PCR, polymerase chain reaction; PPV, positive predictive value.