Table 3. Adjusted odds ratios and 95%CIs for OSCC by oral hygiene.
| Variables | Case–control comparisons | Case–case comparisons | ||||
|---|---|---|---|---|---|---|
| Controls | OSCC-UOF | OSCC-LOF | OSCC-LOF VS OSCC-UOF | |||
| n | n | OR (95%CI)a | n | OR (95%CI)a | OR (95%CI)a | |
| Tooth-brushing (times/day) | ||||||
| <2 | 1025 | 80 | 1.00 | 365 | 1.00 | 1.00 |
| ≥2 | 885 | 39 | 0.62(0.41-0.94) | 213 | 0.67(0.54-0.83) | 1.11(0.71-1.73) |
| Teeth lost | ||||||
| None | 711 | 30 | 1.00 | 152 | 1.00 | 1.00 |
| <5 | 501 | 31 | 1.46(0.86-2.49) | 168 | 1.74(1.34-2.26) | 1.06(0.61-1.86) |
| ≥5 | 698 | 58 | 1.88(1.12-3.16) | 258 | 2.12(1.62-2.77) | 0.96(0.56-1.64) |
| P-trend | 0.010 | <0.001 | 0.752 | |||
| Wearing denture | ||||||
| No | 1172 | 59 | 1.00 | 293 | 1.00 | 1.00 |
| Yes | 738 | 60 | 1.50(1.01-2.24) | 285 | 1.61(1.31-1.98) | 1.03(0.67-1.57) |
| Regular dental visits (years/time) | ||||||
| None | 1526 | 102 | 1.00 | 503 | 1.00 | 1.00 |
| >5 | 204 | 10 | 0.77(0.38-1.52) | 37 | 0.56(0.38-0.82) | 0.75(0.36-1.58) |
| ≤5 | 180 | 7 | 0.58(0.26-1.27) | 38 | 0.49(0.34-0.72) | 0.97(0.42-2.28) |
| P-trend | 0.146 | <0.001 | 0.891 | |||
| Recurrent dental ulcer | ||||||
| No | 1865 | 108 | 1.00 | 513 | 1.00 | 1.00 |
| Yes | 45 | 11 | 4.58(2.27-9.26) | 65 | 5.79(3.83-8.75) | 1.16(0.58-2.32) |
aAdjustment for age, gender, education level, residence, BMI, family history of cancer, tobacco smoking, alcohol drinking.