Table 4.

Performance of the rapid antigen test depending on the N-gene Ct value.

	TOTAL Ct Value < 30	TOTAL Ct Value ≥ 30	≥18 Years Ct Value < 30	≥18 Years Ct Value ≥ 30	<18 Years Ct Value < 30	<18 Years Ct Value ≥ 30
Se	80% [59.3–93.2%]	2.2% [0.1–11.8%]	75% [50.1–91.3%]	3.23% [0.1–16.7%]	100% [47.8–100%]	0% [0–23.2%]
Sp	99.6% [99.3–99.8%]	99.6% [99.3–99.8%]	99.8% [99.5–99.9%]	99.8% [99.5–99.9%]	99,6% [98.2–99.6%]	99.1% [98.2–99.6%]
PPV	57.1% [43.7–69.6%]	6.3% [0.9–33.1%]	68.2% [49.5–82.4%]	12.5% [1.8–53.0%]	38.5% [23.9–55.5%]	0
NPV	99.9% [99.7–99.9%]	98.8% [98.7–98.8%]	99.8% [99.6–99.9%]	98.2% [98.9–99.0%]	100.0%	98.4% [98.3–98.4%]