Techniques, perioperative outcomes, prognosis, and survival associated with laparoscopic surgery for T3-T4a colon cancer

Table 1 Comparison of perioperative indicators in the two groups, n = 101, mean ± SD

Group	Operation time, minutes	Intraoperative blood loss, mL	Number of lymph nodes cleared, count	Drainage time, days	Time to first flatus, days	Hospital stay, days
Open	201.02 ± 9.24	310.10 ± 10.57	14.11 ± 1.16	9.70 ± 2.33	4.81 ± 1.07	11.44 ± 2.67
Laparoscopic	208.21 ± 10.43	299.22 ± 8.48	16.23 ± 2.27	8.02 ± 1.79	3.98 ± 0.93	11.31 ± 2.43
t	5.186	8.069	8.358	5.746	5.884	0.362
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	0.718