Table 3.
Multifactorial regression analyses of CRP levels and periodontitis, stratified by sex, BMI and smoking status
| Exposure | Unadjusted model OR (95% CI) p |
Adjusted Model I OR (95% CI) p |
Adjusted Model II OR (95% CI) p |
|---|---|---|---|
| CRP | 1.2 (1.1, 1.3) 0.003 | 1.3 (1.1, 1.4) < 0.001 | 1.1 (1.0, 1.3) 0.171 |
| CRP (tertile) | |||
| ≤ 0.91 | Ref | Ref | Ref |
| > 0.91, ≤ 1.9 | 1.2 (1.0, 1.4) 0.029 | 1.1 (1.0, 1.4) 0.118 | 1.0 (0.8, 1.3) 0.835 |
| > 1.9 | 1.3 (1.1, 1.5) 0.003 | 1.4 (1.2, 1.7) < 0.001 | 1.1 (0.9, 1.4) 0.360 |
| p for trend | 0.003 | < 0.001 | 0.362 |
| Sex | |||
| Male | 1.4 (1.2, 1.8) 0.001 | 1.4 (1.1, 1.7) 0.006 | 1.1 (0.9, 1.4) 0.343 |
| Female | 1.2 (1.0, 1.4) 0.017 | 1.2 (1.0, 1.4) 0.018 | 1.1 (0.9, 1.3) 0.364 |
| BMI | |||
| BMI < 25 kg/m2 | 2.2 (1.4, 3.5) < 0.001 | 1.7 (1.1, 2.8) 0.031 | 1.3 (0.8, 2.0) 0.298 |
| BMI ≥ 25 - <30 kg/m2 | 1.1 (0.9, 1.3) 0.314 | 1.1 (0.9, 1.3) 0.458 | 0.9 (0.8, 1.1) 0.397 |
| BMI ≥ 30 kg/m2 | 1.1 (0.9, 1.3) 0.244 | 1.3 (1.1, 1.5) 0.005 | 1.2 (1.0, 1.5) 0.045* |
| Smoking status | |||
| never | 1.1 (1.0, 1.3) 0.145 | 1.2 (1.0, 1.4) 0.031 | 1.1 (0.9, 1.3) 0.479 |
| former | 1.2 (0.9, 1.5) 0.142 | 1.2 (0.9, 1.6) 0.124 | 1.0 (0.8, 1.3) 0.820 |
| current | 1.3 (1.0, 1.7) 0.082 | 1.3 (0.9, 1.8) 0.123 | 1.3 (0.9, 1.8) 0.207 |
* p < 0.05
Unadjusted model: not adjusted
Adjusted Model I: adjusted for age and sex
Adjusted Model II: adjusted for age, sex, race, marital status, annual family income level, BMI, alcohol consumption, hypertension, smoking status, COPD, cardiovascular disease, diabetes, flossing, and arthritis