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The combined effect of nine dietary vitamins on periodontitis by WQS model.
| Model | OR (95% CI) | p |
|---|---|---|
| WQS model | 0.88 (0.81–0.95) | 0.001 |
WQS, weighted quantile sum; OR, odds ratio, CI, confidence interval; Model was adjusted for age, gender, race/ethnicity, educational level, marital status, poverty-income ratio, smoking status, anti-infectives, serum vitamin D, white blood cell, decayed teeth, dental floss.
