Table 1.

Baseline characteristics of communities

Characteristic	Median (interquartile range)
	Hand-dug wells (N = 7)	Control (N = 7)
Distance to nearest town (km)	5.4 (4.8–5.6)	6.6 (5.3–9.4)
Altitude (m)	2,624 (2,613–2,644)	2,634 (2,573–2,683)
Population, N	250 (197–304)	239 (199–417)
Children 0–9 years, %	26 (24–28)	24 (22–25)
Trachoma (TF ± TI), %†	30 (19–48)	31 (25–34)*
Chlamydia, %†	0 (0–0)	2 (0–6)*

TF ± TI = follicular trachoma and/or intense trachoma according to the WHO’s simplified grading system.

^*Data available from six of seven control communities.

^†Assessed in a random sample of children aged 0–9 years