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Adverse reactions
| Group | Hematoma | Nausea and vomiting | Skin itching | Skin depression | Total number of cases |
|---|---|---|---|---|---|
| Control group (n=36) | 2 | 2 | 0 | 1 | 5 |
| Observation group (n=33) | 1 | 2 | 1 | 2 | 6 |
| χ2 value | 0.264 | 0.008 | 1.107 | 0.446 | 0.236 |
| P value | 0.607 | 0.928 | 0.292 | 0.504 | 0.626 |
