Prognostic value of lateral lymph node metastasis for advanced low rectal cancer

Table 1 Relations between lateral lymph node metastasis and clinicopathologic characteristics of patients with advanced low rectal cancer

Variable	n	Lateral lymph node metastasis
		Positive (%)	Negative (%)	χ2/P value
Gender
Male	46	6 (13.0)	40 (87.0)
Female	50	8 (16.0)	42 (84.0)	χ2 = 0.168/P = 0.682
Age (yr)
< 60	38	5 (13.2)	33 (86.8)
≥ 60	58	9 (15.5)	49 (84.5)	χ2 = 0.103/P = 0.749
Family history
Yes	21	4 (19.0)	17 (81.0)
No	75	10 (13.3)	65 (86.7)	χ2 = 0.430/P = 0.512
CEA level
High	40	7 (17.5)	33 (82.5)
Normal	56	7 (14.6)	49 (85.4)	χ2 = 0.468/P = 0.494
Superficial diameter (cm)
< 5	56	4 (7.1)	52 (92.9)
≥ 5	40	10 (25.0)	30 (75.0)	χ2 = 5.973/P = 0.015
Diameter of infiltration
1/4	16	1 (6.3)	15 (93.7)
1/2	45	3 (6.7)	42 (93.3)
3/4	25	3 (12.0)	22 (88.0)
4/4	10	7 (70.0)	3 (30.0)	χ2 = 27.944/P = 0.000
Ming’s classification
Expansive	42	5 (11.9)	37 (88.1)
Infiltrative	54	9 (16.7)	45 (83.3)	χ2 = 0.430/P = 0.512
Histologic differentiation
Well	22	1 (4.5)	21 (95.5)
Moderate	44	4 (9.1)	40 (90.9)
Poorly	30	9 (30.0)	21 (70.0)	χ2 = 8.569/P = 0.014
Lymph node metastasis
Positive	56	9 (16.1)	47 (83.9)
Negative	40	5 (12.5)	35 (87.5)	χ2 = 0.239/P = 0.625
Vessel cancerous emboli
Positive	36	6 (16.7)	30 (83.3)
Negative	60	8 (13.3)	52 (86.7)	χ2 = 0.201/P = 0.654

CEA: Carcinoma embryonic antigen.