Table 1. Demographic characteristics of communities and children analyzed.

	Group 1	Group 2	Group 3	Group 4
Treatment	AA-AA-AA-AA-A	PP-PP-AA-AA-A	AA-AA-AA-PP-P	PP-PP-AA-PP-P
Number of villages	51	40	27	32
Number of children (0–59 mo)	1,799	1,432	968	1,141
Mean (±SD) children per village	35 (±4)	36 (±1)	36 (±1)	36 (±2)
Age (months), median (IQR)	30 (23 to 32)	31 (29 to 34)	31 (27 to 33)	29 (26 to 32)
Female, % (95% CI)	48% (45% to 51%)	48% (45% to 51%)	47% (43% to 52%)	49% (46% to 52%)

Summary of the demographic characteristics of the 5,340 children contributing to sample analysis. Enrolled children across groups had a median age of 30 months (95% CI: 29 months to 32 months). On average, there were 36 children (95% CI: 35 to 37) contributing samples from each community, and 48% (95% CI: 47% to 49%) of the children were females. All data is computed by children analyzed.

Abbreviations: A, azithromycin; P, placebo; CI, confidence interval; mo, months; SD, standard deviation.