Table 2.

Proportion of seropositive mothers and children at the start and end of follow-up and geometric mean levels of anti-gp15 IgG antibodies

Sample tested	All children (N = 150)		Bottled water (N = 73)		Municipal water (N = 77)
	Number seropositive (%)	GMC (95% CI) AU	Number seropositive (%)	GMC (95% CI) AU	Number seropositive (%)	GMC (95% CI) AU
Maternal	78 (52)	465.6	42 (58)	524.1	36 (47)	405.2
		(391.3–554)		(401.3–684.6)		(326.4–503)
Child preweaning	30 (20)	342.7	19 (26)	315.9	11 (14)	394.6
		(289–406.4)		(259.4–384.6)		(278.5–559.1)
Child postinfection/end of follow-up	62 (41)	627.8	31 (42)	609.3	31 (40)	646.8
		(517.6–761.4)		(451.0–823.2)		(499.1–838.1)

AU = arbitrary units; CI = confidence interval; GMC = geometric mean concentration.