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VATS辅助三孔切口进行肺癌手术的患者的术后特征（Mean±SD）
Postoperative characteristics of patients underwent VATS assisted three-hole incision（Mean±SD）
| VATS assisted three-hole incision | P | ||
| General drainage group (n=274) | Anhydrous negative pressure drainage group (n=38) | ||
| Postoperative hospital stay (d) | 5.4±2.1 | 4.2±1.1 | 0.01 |
| Total hospital stay (d) | 12.9±3.9 | 9.9±3.4 | 0.12 |
