Table 3. Adjusted Hazard Ratios (HR) of Dementia Because of mTBI in Patients Older than 65 Years.
| Variables | Hazard ratio | 95% confidence interval | P-value |
| mTBI | 3.27 | 2.67–4.00 | <0.001 |
| Male | 0.62 | 0.54–0.71 | <0.001 |
| Patient age | 1.08 | 1.07–1.09 | <0.001 |
| Charlson Comorbidity Index Score | |||
| 0 | 1 | – | – |
| 1 | 1.26 | 1.02–1.56 | 0.031 |
| ≥2 | 1.43 | 1.16–1.77 | 0.001 |
| Diabetes | 1.36 | 1.17–1.58 | <0.001 |
| Hypertension | 0.99 | 0.85–1.14 | 0.839 |
| Coronary artery disease | 1.04 | 0.90–1.21 | 0.559 |
| Hyperlipidemia | 0.83 | 0.71–0.97 | 0.017 |
| History of alcohol intoxication | 1.48 | 0.70–3.12 | 0.303 |
| Ischemic stroke | 1.47 | 0.95–2.28 | 0.084 |
| Intracranial hemorrhage | 1.39 | 1.20–1.62 | <0.001 |
| Socioeconomic status | |||
| Low | 1 | – | – |
| Moderate | 0.79 | 0.67–0.93 | 0.005 |
| High | 1.05 | 0.43–2.53 | 0.922 |
| Urbanization level | |||
| Urban | 1 | – | – |
| Suburban | 1.17 | 0.99–1.38 | 0.070 |
| Rural | 1.11 | 0.92–1.35 | 0.276 |