Table 4.

Association between exposure status and risk of diarrhea among 1,036 children less than five years of age living in Kongwa, Tanzania, by follow-up period^*

Risk factor	0–1 months, rate ratio (95% CI)	1–3 months, rate ratio (95% CI)	3–6 months, rate ratio (95% CI)
Lives in MDA village
Yes	0.61 (0.39–0.95)	0.76 (0.54–1.07)	0.85 (0.60–1.20)
No	1	1	1

^*Adjusted for effects of child's age < 2 years at enrollment, presence of a toilet in the household, and antibiotic treatment of acute lower respiratory illness during follow-up period. Standard errors corrected for clustering. CI = confidence interval; MDA = mass distribution of azithromycin.