. Author manuscript; available in PMC: 2024 Apr 10.

Published in final edited form as: Clin Microbiol Infect. 2018 Aug 11;25(5):623–627. doi: 10.1016/j.cmi.2018.08.001

Table 1.

Combined test performance by assay type and pathogen

Men who have sex with men, transgender women and female sex workers		Cobas CT		Xpert Test Performance % (95% CI)
		Positive	Negative	Xpert Test Performance % (95% CI)
Xpert CT (new test)	Positive	144	8	PPA 96.7% (92.3%–98.9%)
	Negative	5	169	NPA 95.5% (91.3%–98.0%)
				ORA 96.0% (93.3%–97.8%)
Men who have sex with men, transgender women and female sex workers		Cobas NG
		Positive	Negative
				PPA 93.0% (86.1%–97.1%)
Xpert NG (new test)	Positive	93	0	NPA 100.0% (98.3%–100.0%)
Xpert NG (new test)	Negative	7	226	ORA 97.8% (95.6%–99.1%)

CT, Chlamydia trachomatis; NG, Neisseria gonorrhoeae; NPA, negative percentage agreement; ORA, overall rate of agreement; PPA, positive percentage agreement.