Table 2.

Performance of the ELISA test, relative to PCR

	PCRa +	PCR -		Total
Diagnostic outcomes
ELISA +	16	47		63
ELISA -	3	114		117
Total	19	161		180
Performance estimates (95% Confidence Intervals)
Cut-off S/P value			165
Area Under Curve			0.80 (0.73, 0.87)
Sensitivity			0.84 (0.60, 0.97)
Specificity			0.71 (0.63, 0.78)

^aPCR results with CT values > 36 were considered negative, because the specificity was better than results with CT values >40 were considered negative.