Table 2.

Average Prevalence of Trachoma and Chlamydia trachomatis Infection, and Measures of Clean Faces and Latrines in Communities at Follow-up, Stratified by Number of Rounds of Mass Treatment

No. of previous rounds of annual mass treatment	Prevalence of clean faces, mean % (95% CI)	Prevalence of households with latrines, mean % (95% CI)	Prevalence of trachoma, mean % (95% CI)	Prevalence of infection, mean % (95% CI)
3	37.5 (24.6–50.3)	9.7 (0.3–19.0)	20.3 (7.9–32.8)	7.8 (0.8–14.8)
4	50.6 (45.2–55.9)	59.1 (43.8–74.4)	9.3 (5.1–13.5)	2.8 (1.3–4.3)
5	45.1 (40.2–50.0)	69.6 (56.7–82.5)	12.8 (8.2–17.5)	6.4 (2.2–10.6)
6	46.1 (40.6–51.6)	62.9 (53.4–72.5)	12.6 (8.9–16.2)	5.8 (2.8–8.7)
7	51.6 (45.9–57.6)	67.9 (59.0–76.7)	9.1 (6.4–11.7)	6.1 (4.1–8.2)

NOTE. Trachoma refers to active disease (follicular trachoma or intense trachoma). CI, confidence interval.