Table 1.

Univariate analysis of the associations between childhood diarrhea and tubewell access in Matlab, 2000-2006.

Independent variable	Control variables	N	OR	95%CI		p
Density-based tubewell access	Unstratified	51406	0.87	0.85	0.89	< 0.001
	Flood control
	Yes	17926	1.02	0.98	1.06	0.321
	No	33480	0.84	0.82	0.87	< 0.001
	Population density
	Low	15048	0.87	0.83	0.91	< 0.001
	Medium	16919	0.85	0.82	0.89	< 0.001
	High	19439	0.81	0.78	0.84	< 0.001
	Wealth
	Low	2797	0.94	0.85	1.04	0.242
	Low medium	13357	0.84	0.81	0.88	< 0.001
	Medium	21943	0.91	0.88	0.94	< 0.001
	High medium	10536	0.87	0.83	0.92	< 0.001
	High	2039	0.89	0.79	1.00	0.055
	Education
	< 1 year	3862	0.90	0.82	0.98	0.018
	1-3 years	12710	0.86	0.83	0.90	< 0.001
	3-5 years	18303	0.88	0.85	0.91	< 0.001
	5-7 years	11251	0.88	0.84	0.93	< 0.001
	≥ 7 years	5280	0.97	0.90	1.05	0.450
	Year
	2000	7066	0.83	0.78	0.88	< 0.001
	2001	7240	0.80	0.75	0.85	< 0.001
	2002	7369	0.88	0.82	0.93	< 0.001
	2003	7435	0.90	0.85	0.95	< 0.001
	2004	7494	0.91	0.86	0.96	0.001
	2005	7445	0.93	0.87	0.99	0.014
	2006	7357	0.91	0.85	0.97	0.002
	Children age
	0-12 months	2980	0.92	0.81	1.04	0.191
	13-24 months	3620	0.94	0.86	1.03	0.166
	25-36 months	4027	0.88	0.81	0.96	0.003
	37-48 months	3970	0.91	0.83	1.00	0.059
	49-60 months	3385	0.89	0.80	1.00	0.040