Table 3.

Assay performance simulating high-volume CT/NG testing (n = 556), results for Neisseria gonorrhoeae^*

		Aptima Combo 2
		NG positive	NG negative	Total
cobas CT/NG	NG positive	4	1	5
	NG negative	0	551	551
	Total	4	552	556
PPA (95% CI), NPA (95% CI)		100 (39.8, 100)	99.8 (99, 100)
OPA (95% CI)		99.8 (99, 100)
p-value†		1

^*Comparison of cobas CT/NG for use on the cobas 6800 system and Aptima Combo 2 on the Panther system

^†Calculated using McNemar’s test

Abbreviations: CI confidence interval, NG Neisseria gonorrhoeae, NPA negative percent agreement, OPA overall percent agreement, PPA positive percent agreement