Table 3. Gender- and BMI-stratified ORs and 95% CIs for IBS across categories of whole-day water intakea.
| Whole-day water intake (n. of glasses/d) | |||||
|---|---|---|---|---|---|
| <2 | 2–5 | 6–8 | >8 | P-trend | |
| Male | |||||
| Crude | 1.00 | 1.04 (0.76–1.42) | 1.14 (0.80–1.62) | 0.72 (0.42–1.25) | 0.72 |
| Model Ib | 1.00 | 1.00 (0.71–1.41) | 1.04 (0.69–1.56) | 0.94 (0.51–1.70) | 0.98 |
| Model IIc | 1.00 | 1.21 (0.81–1.80) | 1.46 (0.91–2.32) | 1.10 (0.57–2.10) | 0.31 |
| Model IIId | 1.00 | 1.22 (0.81–1.85) | 1.51 (0.93–2.43) | 1.15 (0.59–2.24) | 0.24 |
| Female | |||||
| Crude | 1.00 | 1.03 (0.84–1.26) | 0.84 (0.62–1.13) | 0.78 (0.45–1.33) | 0.24 |
| Model Ib | 1.00 | 1.03 (0.83–1.27) | 0.85 (0.62–1.17) | 0.74 (0.42–1.32) | 0.26 |
| Model IIc | 1.00 | 1.00 (0.78–1.27) | 1.00 (0.71–1.41) | 1.11 (0.60–2.05) | 0.83 |
| Model IIId | 1.00 | 0.99 (0.78–1.27) | 0.99 (0.70–1.41) | 1.15 (0.62–2.12) | 0.82 |
| BMI<25 (kg/m2) | |||||
| Crude | 1.00 | 0.95 (0.75–1.20) | 0.90 (0.66–1.22) | 0.52 (0.29–0.95) | 0.09 |
| Model Ie | 1.00 | 0.98 (0.76–1.25) | 0.90 (0.63–1.27) | 0.77 (0.41–1.43) | 0.38 |
| Model IIc | 1.00 | 1.05 (0.79–1.39) | 1.14 (0.78–1.66) | 0.98 (0.51–1.87) | 0.65 |
| Model IIId | 1.00 | 1.06 (0.79–1.42) | 1.15 (0.78–1.70) | 1.01 (0.51–2.01) | 0.58 |
| BMI≥25 (kg/m2) | |||||
| Crude | 1.00 | 1.03 (0.80–1.33) | 0.87 (0.63–1.21) | 0.79 (0.47–1.31) | 0.92 |
| Model Ie | 1.00 | 1.07 (0.82–1.41) | 0.94 (0.65–1.34) | 0.89 (0.50–1.57) | 0.63 |
| Model IIc | 1.00 | 1.05 (0.77–1.44) | 1.16 (0.78–1.73) | 1.19 (0.64–2.19) | 0.41 |
| Model IIId | 1.00 | 1.07 (0.77–1.48) | 1.19 (0.79–1.79) | 1.30 (0.70–2.43) | 0.29 |
aValues are OR (95% CIs).
bAdjusted for age.
cAdditionally, adjusted for marital status, smoking status, supplement use, depression, GI medications use and antipsychotic medications use.
dAdditionally, adjusted for meal pattern regularity and dental status.
eAdjusted for age and sex.
IBS: Irritable Bowel Syndrome; BMI: Body Mass Index.