Table 3. Specificity and sensitivity of PCR on blood during post-treatment follow-up.

	Blood
	Cured patients			Patients with treatment failure
FU time point	Number of specimens	Number of positive PCRs	Specificity % (95% CI)	Number of specimens	Number of positive PCRs	Sensitivity % (95% CI)
Pre-treatment	174	101	42.0 (34.6–49.3)	134	109	81.3 (74.7–88.0)
3 months	169	33	80.5 (74.5–86.3)	126	27	21.4 (14.2–28.7)
6 months	168	17	89.9 (85.3–94.5)	80	10	12.5 (5.2–19.8)
12 months	157	12	92.4 (88.2–96.6)	27	8	29.6 (12.0–47.3)
18 months	132	10	92.4 (87.9–97.0)	10	2	20.0 (0–46.4)
24 months	160	30	81.2 (75.1–87.4)	4	2	50 (0.0–1.0)

Note. CI = confidence interval.