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| WHO grading Scale | Range | Before Intervention | After Intervention | ||
| Frequency | Percentage | Frequency | Percentage | ||
| Normal | 0 | 0 | 0 | 16 | 35.6% |
| Grade 1 | 1 | 16 | 35.6% | 29 | 64.4% |
| Grade 2 | 2 | 29 | 64.4% | 0 | 0 |
| Grade 3 | 3 | 0 | 0 | 0 | 0 |
| Grade 4 | 4 | 0 | 0 | 0 | 0 |
