Effect of two surgical approaches on the lung function and prognosis of patients with combined esophagogastric cancer

Table 2 Comparison of lymph node dissection effect between two groups of patients (mean ± SD, number)

Group	n	Number of lymph nodes cleaned	Number of positive lymph nodes	Inferior mediastinal lymph nodes	Subphrenic lymph node	Number of abdominal lymph nodes
A group	70	33.87 ± 3.82	3.65 ± 1.20	3.81 ± 1.20	2.56 ± 0.72	27.50 ± 2.95
B group	68	34.33 ± 2.90	3.92 ± 1.53	4.03 ± 1.15	2.74 ± 0.75	27.56 ± 3.02
t value		-0.795	-1.155	-1.099	-1.438	-0.118
P value		0.428	0.250	0.274	0.153	0.906