Efficacy of laparoscopic low anterior resection for colorectal cancer patients with 3D-vascular reconstruction for left coronary artery preservation

Table 4 Postoperative pathological results [mean ± SD, n (%)]

Pathological index	3D vascular reconstruction group (n = 72)	Non-3D vascular reconstruction group (n = 74)	χ2	P value
Tumor size (cm)	3.1 ± 0.8	2.9 ± 0.9	1.309	0.193
Number of lymph nodes	18.3 ± 2.7	17.6 ± 2.1	1.72	0.088
Degree of differentiation			0.085	0.958
Low	20 (27.8)	19 (25.7)
Middle	39 (54.2)	41 (55.4)
High	13 (18.1)	14 (18.9)
Pathological stage			0.248	0.883
Stage I	14 (19.4)	13 (17.6)
Stage II	35 (48.6)	39 (52.7)
Stage III	23 (31.9)	22 (29.7)