Table 2.

Comparison of intraoperative and postoperative date of different groups

Characteristic	Male	Female	Statistics	P
operation time(min)	124.20 ± 36.15)[50–244]	114.79 ± 35.15[48–242]	2.422	0.016
intraoperative blood loss (ml)	101.55 ± 73.35[10–400]	88.23 ± 83.71[20–600]	1.558	0.12
lymph node dissection station	5.38 ± 1.02[3–9]	5.27 ± 1.04[3–8]	0.992	0.322
lymph node dissection number	11.9 ± 4.55[4–30]	10.74 ± 3.83[4–23]	2.548	0.011
number of ICU transfers after surgery	4(2.3)	4(2.4)	0.07	0.932
postoperative chest drainage tube indwelling time	6.02 ± 3.95[2–27]	4.47 ± 2.33[2–15]	4.43	<0.001
postoperative hospital stay (day)	8.51 ± 4.38[3–33]	6.57 ± 2.51[3–17]	5.03	<0.001
postoperative average daily chest drainage	207.79 ± 65.27[66.7–410]	174.91 ± 58.75[50–432]	4.857	<0.001
hospital mortality	1(0.6)	0(0)	0.943	0.332
postoperative complication
arrhythmia	7(4.0)	3(1.8)	1.415	0.234
atelectasis	10(5.7)	6(3.7)	0.817	0.366
pulmonary infection	47(27)	20(12.2)	11.664	0.001
respiratory failure	3(1.7)	0(0)	1.23	0.091
chyle fistula	4(2.3)	0(0)	2.103	0.147
hydrothorax	7(4.0)	3(1.8)	0.754	0.385
severe subcutaneous emphysema	12(6.9)	2(1.2)	6.853	0.009
persistent air leakage	21(12.1)	8(4.9)	5.566	0.018