| Levels | HENE + Clindamycin | Clindamycin | p | ||
| N | % | n | % | ||
| Very good | 16 | 51.6 | 9 | 30.0 | <0.05 (χ2 = 7.946) |
| Good | 15 | 48.4 | 15 | 50.0 | |
| Moderate | 0 | 0 | 6 | 20.0 | |
| Poor | 0 | 0 | 0 | 0 | |
| Total | 31 | 100.0 | 30 | 100.0 | |