Table 3.

Poisson regression analysis of the association between primary water source and rate of childhood diarrhea by study location in Jakarta, Indonesia

		Tap water	Bottled water	Water kiosk	Combination
		N = 142	N = 64	N = 148	N = 146
Northern urban slum area	Total diarrhea-days	146	29	74	94
	Total child-days of follow-up	17,954	8,055	18,640	18,543
	Rate per 1,000 child-days	8.13	3.60	3.97	5.07
	Unadjusted rate ratio (95% CI)	1.00	0.44 (0.19–0.98)	0.49 (0.28–0.86)	0.63 (0.37–1.05)
	Adjusted* rate ratio (95% CI)	1.00	0.45 (0.21–0.97)	0.49 (0.29–0.83)	0.61 (0.37–1.01)
		Well water	Bottled water	Water kiosk	Combination
		N = 142	N = 64	N = 148	N = 146
Southern peri-urban area	Total diarrhea-days	63	19	9	58
	Total child-days of follow-up	25,863	9,978	3,549	24,286
	Rate per 1,000 child-days	2.44	1.90	2.54	2.39
	Unadjusted rate ratio (95% CI)	1.00	0.78 (0.32–1.92)	1.04 (0.31–3.55)	0.98 (0.52–1.83)
	Adjusted* rate ratio (95% CI)	1.00	0.89 (0.38–2.09)	0.98 (0.31–3.09)	1.03 (0.57–1.87)

^*Adjusted for child's sex, child's age in months, household size, whether household income per capita is below poverty, household's sanitation facilities, and head of household's education level.

CI = confidence interval.