Table 2.
Relationship between plain water intake and periodontitis
| Model I | Model II | Model III | |
|---|---|---|---|
| OR1 (95%CI2) | OR (95%CI) | OR (95%CI) | |
| Plain water intake (quartiles) | |||
| Q1 | Reference | Reference | Reference |
| Q2 | 0.79 (0.67, 0.91) | 0.75 (0.64, 0.88) | 0.84 (0.68, 1.05) |
| Q3 | 0.72 (0.62, 0.84) | 0.75 (0.64, 0.88) | 0.75 (0.63, 0.96) |
| Q4 | 0.63 (0.54, 0.73) | 0.69 (0.59, 0.81) | 0.78 (0.62, 0.96) |
| P for trend | < 0.0001 | < 0.0001 | 0.031 |
| Plain water intake, (every 500 ml) | 0.93 (0.91, 0.96) | 0.96 (0.93, 0.99) | 0.97 (0.94, 1.01) |
1OR: odds ratio
2 95%CI: 95% confidence interval
Model I: Non-adjusted model
Model II: adjusted for gender, age, race
Model III: adjusted for: age, gender, race, education level, family to ratio of family income to poverty, BMI, smoking status, alcoholic status, hypertension, diabetes, CKD, cardiovascular disease, physical activity time, total energy intake