Table 5. Predictive values of risk factors with calculated HR with 95% CI for cancer in cheek region.
| B | HR | 95% CI | p-value | ||
|---|---|---|---|---|---|
| Gender | 0.404 | 1.497 | 1.146 | 1.965 | 0.003 |
| Age group (years): | |||||
| 0-9 | Reference | ||||
| 10-19 | -1.078 | 0.340 | 0,062 | 1.858 | 0.213 |
| 20-29 | -0.932 | 0.394 | 0,098 | 1.577 | 0.188 |
| 30-39 | -0.443 | 0.642 | 0,213 | 1.940 | 0.433 |
| 40-49 | -0.442 | 0.643 | 0,209 | 1.976 | 0.440 |
| 50-59 | -0.013 | 0.987 | 0,342 | 2.846 | 0.980 |
| 60-69 | -1.232 | 0.292 | 0,099 | 0.859 | 0.025 |
| 70-79 | -0.425 | 0.654 | 0,237 | 1.804 | 0.412 |
| 80-89 | -0.425 | 0.654 | 0,236 | 1.811 | 0.414 |
| 90-99 | -0.210 | 0.810 | 0,28 | 2.343 | 0.698 |
| Occupation: | |||||
| Worker | Reference | ||||
| Housewife | 0.543 | 1.722 | 0,951 | 3.115 | 0.073 |
| Retiree | 0.798 | 2.220 | 1,283 | 3.844 | 0.004 |
| Pupil | 0.575 | 1.778 | 1,116 | 2.832 | 0.015 |
| Student | 0.324 | 1.383 | 0,473 | 4.042 | 0.553 |
| Child <6 years | 0.997 | 2.710 | 1,240 | 5.923 | 0.012 |
| Field worker | 1.083 | 2.953 | 1,187 | 7.344 | 0.020 |
| Birthplace | -0.162 | 0.850 | 0.642 | 1.127 | 0.259 |
| Recurrence | -0.540 | 0.583 | 0.211 | 1.609 | 0.297 |
| Multi-site | -0.912 | 0.402 | 0.198 | 0.814 | 0.011 |
| Risk factors: | |||||
| Sun exposure | Reference | ||||
| Tobacco | 0.539 | 1.714 | 1,118 | 2.627 | 0.013 |
| Alcohol | 0.141 | 1.151 | 0,472 | 2.810 | 0.757 |
| Various chemical materials | 1.051 | 2.861 | 0,387 | 21.169 | 0.303 |
| Multiple | 0.808 | 2.243 | 1,379 | 3.648 | 0.001 |
| Family history | -0.132 | 0.876 | 0.524 | 1.464 | 0.614 |
*Hazard ratios (HR) were calculated with Cox regression, where presence of cancer was dependent variable; B value was determined as correlation coefficient between independent and dependent variable; 95% CI = 95% confidence interval.