| Group | Number of cases | Pulmonary atelectasis | Infection | Chylothorax | Incidence of complications (%) | χ2 | P |
| Control group | 50 | 5 | 2 | 1 | 16% | 4.000 | 0.046 |
| Observation group | 50 | 2 | 0 | 0 | 4% |
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