Table 6.
Correlation between toothbrushing habits and dentin hypersensitivity (DH)
| Toothbrushinghabits | DH |
Total n (%) | χ2* | P value | |
|---|---|---|---|---|---|
| Absent n (%) | Present n (%) | ||||
| Frequency | |||||
| Once daily | 161 (56.5) | 124 (43.5) | 285 (100) | 0.015 | 0.91, NS |
| Twice daily | 68 (57.1) | 51 (42.9) | 119 (100) | ||
| Total | 229 (56.6) | 175 (43.7) | 404 (100) | ||
| Method | |||||
| H | 120 (54.3) | 101 (45.7) | 221 (100) | 3.69 | 0.15, NS |
| H + V | 84 (63.2) | 49 (36.8) | 133 (100) | ||
| V | 25 (50.0) | 25 (50.0) | 50 (100) | ||
| Total | 229 (56.6) | 175 (43.7) | 404 (100) | ||
| Bristle type | |||||
| Soft | 34 (64.2) | 19 (35.8) | 53 (100) | 1.95 | 0.37, NS |
| Medium | 185 (56.1) | 145 (43.9) | 330 (100) | ||
| Hard | 10 (47.6) | 11 (52.4) | 21 (100) | ||
| Total | 229 (56.6) | 175 (43.7) | 404 (100) | ||
*
Chi-square test. H, horizontal; H + V, horizontal + vertical; V, vertical; NS, non-significant.