TABLE 2.

Agreement of the Detection of Sexually Transmitted Infections, by Collection Method, Overall, and by Visit

		Physician-Collected
		Chlamydia trachomatis			Neisseria gonorrhoeae			Trichomonas vaginas			Mycoplasma genitalium
Visit	Self-Collected	Negative	Positive	κ (95% CI)	Negative	Positive	κ (95% CI)	Negative	Positive	κ (95% CI)	Negative	Positive	κ (95% CI)
Overall	Negative	1838	4	0.77	1888	1	0.86	1808	4	0.85	1534	18	0.66
	Positive	25	52	(0.69–0.85)	7	25	(0.76–0.96)	26	88	(0.79–0.90)	158	220	(0.62–0.71)
Baseline	Negative	329	1	0.79	338	0	0.89	315	1	0.83	274	4	0.66
	Positive	5	12	(0.63–0.95)	2	8	(0.73–1.00)	8	24	(0.72–0.94)	29	41	(0.55–0.76)
Month 3	Negative	286	0	0.96	292	0	0.93	279	0	0.86	230	5	0.60
	Positive	1	13	(0.89–1.00)	1	7	(0.80–1.00)	5	16	(0.73–0.98)	30	35	(0.48–0.72)
Month 6	Negative	266	0	0.66	267	1	0.80	261	2	0.77	226	3	0.50
	Positive	4	4	(0.35–0.97)	1	4	(0.52–1.00)	3	9	(0.58–0.97)	28	19	(0.35–0.64)
Month 9	Negative	246	1	0.71	254	0	1.00	242	0	0.84	209	1	0.75
	Positive	3	5	(0.43–0.98)	0	1	(1.00–1.00)	4	11	(0.68–0.99)	16	32	(0.64–0.86)
Month 12	Negative	262	1	0.74	270	0	0.80	265	0	1.00	209	2	0.69
	Positive	3	6	(0.50–0.99)	1	2	(0.41–1.00)	0	10	(1.00–1.00)	25	39	(0.58–0.79)
Month 15	Negative	225	1	0.77	236	0	0.80	226	1	0.82	192	1	0.73
	Positive	4	9	(0.58–0.97)	1	2	(0.41–1.00)	3	10	(0.66–0.99)	17	30	(0.61–0.84)
Month 18	Negative	224	0	0.54	231	0	0.66	220	0	0.84	194	2	0.73
	Positive	5	3	(0.18–0.89)	1	1	(0.05–1.00)	3	8	(0.65–1.00)	13	24	(0.60–0.86)

CI indicates confidence interval