Table 3.

Odds ratio estimation by ranges of arsenic in water and urine

Water arsenic	OR* (95 % CI)	P-value	Urine arsenic	OR* (95 % CI)	P-value
Group 1a n = 10	Reference		Tertile 1d n = 102	Reference
Group 2b n = 69	1.486 (0.200–11.025)	0.698	Tertile 2e n = 102	1.400 (0.748–2.621)	0.698
Group 3c n = 227	1.715 (0.732–4.019)	0.214	Tertile 3f n = 102	0.788 (0.411–1.512)	0.214

^a DW As < 10 μg/L

^b DW As 10.1–25 μg/L

^c DW As >25 μg/L

^d U-tAs ≤7.4956 μg/L

^e U-tAs >7.4956 ≤ 11.4911 μg/L

^f U-tAs >11.4911 μg/L

* ORs were adjusted for age and weeks of pregnancy