Table 2.
Poisson regression analysis for the crude associations of dental caries with internet addiction, the unhealthy lifestyle behavior index, and other factors (N = 1562).
| Variables | Outcome = DMFT | ||
|---|---|---|---|
| IRR | 95% CI | p value* | |
| Internet addiction | 1.12 | 1.03–1.21 | < 0.01 |
| ULBI (per one-point increase) | 1.10 | 1.07–1.13 | < 0.01 |
| School grade | |||
| 10th | Reference | ||
| 11th | 1.41 | 1.29–1.53 | < 0.01 |
| 12th | 1.71 | 1.56–1.86 | < 0.01 |
| Male (vs. female) | 0.96 | 0.89–1.03 | 0.25 |
| Receiving professional tooth brushing instruction | 1.38 | 1.28–1.48 | < 0.01 |
| Use of fluoride toothpaste | 0.95 | 0.89–1.02 | 0.18 |
| Experience of fluoride application† | 0.90 | 0.83–0.96 | < 0.01 |
| Regular dental visits | 1.21 | 1.12–1.29 | < 0.01 |
| Overweight | 0.99 | 0.88–1.12 | 0.90 |
CI confidence interval, DMFT number of decayed, missing, and filled permanent teeth, IRR incidence rate ratio, ULBI unhealthy lifestyle behavior index.
*Except for unhealthy lifestyle score, grade, and sex, IRRs and CIs of being positive are presented.
†Either a professional topical fluoride application or fluoride mouth rinse.