Comparison of Three Methods for Diagnosing Trichomoniasis in Female Patients with Sexual Activity Attended at a Hospital in Peru

Table 4

Evaluation of the direct method and Papanicolaou in comparison with culture.

Parameter	95% CI
	Direct examination	Pap smear
Sensitivity	65.1 (49.1-79.0)	32.6 (19.5-48.7)
Specificity	98.9 (94.0-99.9)	98.9 (93.2-99.9)
Positive predictive value	95.6 (79.8-99.5)	93.3 (66.0-99.7)
Negative predictive value	85.7 (79.9-90.0)	75.6 (66.7-82.8)
Positive likelihood ratio	59.3 (8.3-421.3)^a	29.6 (4.0-218.1)^a
Negative likelihood ratio	0.4 (0.2-0.5)^a	0.7 (0.6-84.0)^a
False positives	96.6 (80.4-99.8)	6.7 (0.3-34.0)
False negatives	3.4 (0.2-19.6)	24.4 (17.2-33.2)
AUC	82.0 (74.7-89.3)	65.7 (58.6-72.9)
Concordance (kappa)	70.0 (56.8-83.3)	38.0 (22.3-53.7)

^aAbsolute value.