Table 3. Results of logistic regression analysis for Alzheimer’s disease with sex, age group, and number of teeth present in subjects diagnosed as having periodontitis.
| Independent variable | Odds ratio | 95% confidence interval | p-value | ||
|---|---|---|---|---|---|
| Lower limit | Upper limit | ||||
| Sex | Male | 1.00 | (Reference) | ||
| Female | 1.60 | 1.58 | 1.62 | <0.001 | |
| Age group (y) | 60–64 | 1.00 | (Reference) | ||
| 65–69 | 2.25 | 2.09 | 2.43 | <0.001 | |
| 70–74 | 5.72 | 5.34 | 6.13 | <0.001 | |
| 75–79 | 14.48 | 13.54 | 15.49 | <0.001 | |
| 80–84 | 39.02 | 36.51 | 41.71 | <0.001 | |
| 85– | 112.32 | 105.10 | 120.02 | <0.001 | |
| Number of teeth present (excluding third molars) | 20–28 | 1.00 | (Reference) | ||
| 10–19 | 1.11 | 1.10 | 1.13 | <0.001 | |
| 1–9 | 1.34 | 1.32 | 1.37 | <0.001 | |
Dependent variable: having Alzheimer’s disease (yes/no).