. Author manuscript; available in PMC: 2009 Dec 1.

Published in final edited form as: J Pediatr Adolesc Gynecol. 2008 Dec;21(6):355–360. doi: 10.1016/j.jpag.2008.03.010

Table 2.

Performance of SVS, FVU and PES specimens in the detection of CT and NG infection

	True positive ^a	False positive	False negative	True negative	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Indetermination
	True positive ^a	False positive	False negative	True negative	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	True positive (%)^b	True negative (%)^c
SVS-CT	108	5	2	919	97.3	94.8	94.7	95.1	1 (0.9)	45 (4.6)
FVU-CT	99	5	12	926	89.2	95.6	95.2	94.9	0 (0.0)	38 (3.9)
PES-CT	100	4	11	961	90.1	99.2	96.2	98.5	0 (0.0)	4 (0.4)
SVS-NG	44	6	0	980	100	94.7	88.0	95.2	0 (0.0)	49 (4.7)
FVU-NG	39	1	4	996	88.6	96.2	95.1	96.0	1 (2.3)	38 (3.7)
PES-NG	42	0	2	1032	95.5	99.7	100	99.5	0 (0.0)	3 (0.3)

as defined by positive results from at least two of SVS, FVU or PES specimens;

indeterminate results fell into true positive category, percentage = number of indeterminate results/(number of indeterminate results + TP + FN);

indeterminate results fell into true negative category, percentage = number of indeterminate results/(number of indeterminate results + TN + FP). Indeterminate results were included in the calculation of sensitivity, specificity, PPV and NPV.