Table 3B.
Logistic regression analysis relating rates of severe periodontal disease to cigarette smoking status and age.
| Baseline visit | Follow-up visit | ||||||
|---|---|---|---|---|---|---|---|
| Step1* | OR (CI) | p-Values | Step1* | OR (CI) | p-Values | ||
| Cigarette smoking | 4.1 (1.7–10.3) | 0.002 | Cigarette smoking | 4.3 (1.6–11.3) | 0.003 | ||
| Step2* | Step2* | ||||||
| Cigarette smoking | 2.0 (0.7–5.7) | 0.18 | Cigarette smoking | 1.8 (0.6–5.4) | 0.31 | ||
| Age (years) | 1.07 (1.03–1.12) | 0.002 | Age (years) | 1.09 (1.04–1.15) | <0.001 | ||
*
Smoking status was entered into the regression on step 1, and age was then added in step 2. When adjusting age, smoking status no longer predicts severe periodontal disease.