Table 3.

Assessment of the diagnostic accuracy of the antigen test.

	Value		95% CI
Prevalence	17.5%	16%		18.7%
Sensitivity	82.1%	79.2%		84.8%
Specificity	99.1%	98.8%		99.4%
Positive predicted value	95.3%	93.3%		96.8%
Negative predicted value	96.3%	95.6%		96.9%
Positive likelihood ratio	94.4	66		135
Negative likelihood ratio	0.18	0.154		0.211
False discovery rate	3.8%	3.3%		4.4%
Kappa coefficient**	85.9%	83.8%		88%

^**The p-value of the kappa coefficient p < 0.001.