Table 2.

Sociodemographic factors associated enterotoxigenic Bacteroides fragilis infection in each of the eight study sites

Factors	Incidence rate ratio of B. fragilis detection per 100 child-months (95% CI)	P value
Female gender	0.96 (0.94–0.97)	< 0.001
Duration of exclusive breastfeeding, mo	0.98 (0.96–0.99)	< 0.001
LAZ at enrollment	0.98 (0.97–0.99)	< 0.001
Maternal height, cm	1.0 (0.99–1.0)	0.352
Maternal age, y	1.0 (0.99–1.0)	0.004
Maternal education > 6 y	0.89 (0.88–0.91)	< 0.001
Improved drinking water source	0.92 (0.90–0.95)	< 0.001
Routine treatment of drinking water	1.0 (0.98–1.02)	0.732
Lack of improved sanitation	1.21 (1.18–1.25)	< 0.001
Improved floor material in households	0.93 (0.90–0.95)	< 0.001
More than 2 people living in a single room	1.04 (1.02–1.05)	< 0.001
Mother has more than 3 living children	1.10 (1.07–1.11)	< 0.001
Household ownership of chicken or cattle	1.15 (1.13–1.17)	< 0.001

LAZ = length-for-age z-score. A Poisson regression model was used. The dependent variable was the number of infections during follow-up (1–24 months) and the offset variable was the log of the total number of follow-ups. All analyses were adjusted for different study sites and all variables included in the multivariable model.