表 2.

两组术中及术后资料对比

Comparison of intraoperative and postoperative data between two groups

Items	Single-portal group (n=42)	Two-portal group (n=42)	t/χ2	P
VTE: venous thromboembolism; VAS: visual analogue scale.
Length of surgery (Mean±SD, min)	130.00±26.23	135.24±27.03	0.901	0.370
Bleeding (Mean±SD, mL)	69.52±22.73	82.38±49.23	1.537	0.128
Thoracic drainage duration (Mean±SD, d)	2.95±0.76	3.33±0.85	2.167	0.033
Postoperative hospital stay (Mean±SD, d)	4.57±0.83	5.07±1.13	2.304	0.024
Postoperative VAS pain score (Mean±SD)
Postoperative 24 h	3.64±0.85	4.05±0.66	2.436	0.017
Postoperative 72 h	2.33±0.75	3.07±0.68	4.719	< 0.001
Complications			1.120	0.480
Arrhythmia	1	2
Phrenic nerve injury	0	2
Chest infection	2	1
VTE	0	1