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Comparisons of complication rates [number of case (%)].
| Group | No. of cases | Skin and nasopharyngeal ulcer | Cranial nerve injury | Difficulty in opening mouth | Hearing loss | Xerostomia | Total complication rate |
|---|---|---|---|---|---|---|---|
| Control group | 62 | 2 | 1 | 1 | 1 | 2 | 7 (11.3) |
| Observation group | 62 | 2 | 1 | 0 | 1 | 2 | 6 (9.7) |
| χ2 | 0.086 | ||||||
| P-value | 0.769 |
