Table 2. ORs and 95% CIs for IBS across categories of whole-day water intake^a.

	Whole-day water intake (n. of glasses/d)
	<2	2–5	6–8	>8	P-trend
Crude	1.00	0.98 (0.83–1.15)	0.90 (0.72–1.18)	0.66 (0.46–0.97)	0.05
Model Ib	1.00	1.01 (0.84–1.21)	0.94 (0.74–1.19)	0.84 (0.56–1.25)	0.41
Model IIc	1.00	1.04 (0.85–1.28)	1.14 (0.87–1.49)	1.07 (0.69–1.64)	0.39
Model IIId	1.00	1.05 (0.85–1.29)	1.17 (0.89–1.54)	1.14 (0.74–1.78)	0.26

^aValues are OR (95% CIs).

^bAdjusted for age and sex.

^cAdjusted for marital status, smoking status, supplement use, depression, GI medications use and antipsychotic medications use.

^dAdditionally, adjusted for meal pattern regularity and dental status.

IBS: Irritable Bowel Syndrome.