2.
2组患者近期手术相关不良事件发生率比较
Comparing the recent incidence of adverse operation events in the 2 groups (%)
| Group | Adverse events (n) | No adverse events (n) | χ2 | P |
| Control group | 9 (30.0%) | 21 | 5.364 | 0.021 |
| Trial group | 2 (6.7%) | 28 |
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