Table 1. Demographic data.
| Chronic periodontitis (N = 76,765) | Control (N = 76,765) | p-value | |||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Age | 0.991 | ||||
| <20 | 8,271 | 10.8 | 8,252 | 10.7 | |
| 20–39 | 29,359 | 38.2 | 29,333 | 38.2 | |
| 40–64 | 32,665 | 42.6 | 32,725 | 42.6 | |
| ≧65 | 6,470 | 8.4 | 6,455 | 8.4 | |
| Mean ± SD | 40.8 ± 16.3 | 41.0 ± 16.2 | 0.011* | ||
| Gender | 0.613 | ||||
| Female | 40,525 | 52.8 | 40,624 | 52.9 | |
| Male | 36,240 | 47.2 | 36,141 | 47.1 | |
| Monthly income | 0.772 | ||||
| <NT $20,000 | 37,636 | 49.0 | 37,609 | 49.0 | |
| NT $20,000–NT $40,000 | 21,188 | 27.6 | 21,301 | 27.7 | |
| >NT $40,000 | 17,941 | 23.4 | 17,855 | 23.3 | |
| Urbanization | 0.857 | ||||
| Urban | 51,719 | 67.4 | 51,748 | 67.4 | |
| Suburban | 20,704 | 27.0 | 20,725 | 27.0 | |
| Rural | 4,342 | 5.7 | 4,292 | 5.6 | |
| Hypertension | 9,421 | 12.3 | 9,472 | 12.3 | 0.692 |
| Hyperlipidemia | 5,652 | 7.4 | 5,670 | 7.4 | 0.860 |
| Chronic insomnia | 1,755 | 22.9 | 17,495 | 22.8 | 0.738 |
| CCI† | 0.819 | ||||
| 0 | 58,417 | 76.1 | 58,342 | 76.0 | |
| 1 | 15,107 | 19.7 | 15,136 | 19.7 | |
| ≧2 | 3,241 | 4.2 | 3,287 | 4.3 | |
Notes:
Demographic data of matched study cohorts.
The Student’s t test and Chi-squared test were used to test the difference of continuous and categorical variables, respectively.
†
Charlson comorbidity index.
*
p < 0.05.