Table 3. Prevalence of breathing tests in mouth-breather (MB) and nosebreather (NB) groups.
| Variable | Groups | Total | ||||
|---|---|---|---|---|---|---|
| NB | MB | |||||
| n | % | n | % | n | % | |
| Graded mirror test | ||||||
| Halo greater than 30 mm | 512 | 98.5* | 143 | 85.6 | 655 | 95.3 |
| Halo less than 30 mm | 7 | 1.3 | 23 | 13.8* | 30 | 4.4 |
| Test not performed | 1 | 0.2 | 1 | 0.6 | 2 | 0.3 |
| Lip seal test | ||||||
| 3 minutes | 510 | 98.1* | 86 | 51.5 | 596 | 86.8 |
| Less than 3 minutes | 7 | 1.3 | 80 | 47.9* | 87 | 12.7 |
| Test not performed | 3 | 0.6 | 1 | 0.6 | 4 | 0.5 |
| Water retention test | ||||||
| 3 minutes | 511 | 98.2* | 90 | 53.9 | 601 | 87.5 |
| Less than 3 minutes | 5 | 1 | 76 | 45.5* | 81 | 11.8 |
| Test not performed | 4 | 0.8 | 1 | 0.6 | 5 | 0.7 |
| TOTAL | 520 | 100 | 167 | 100 | 687 | 100 |
*
statistically significant (p < 0.050).