Effect of double-tract reconstruction and laparoscopic proximal gastrectomy on immune function and stress

Table 1 General information of two groups

Indicators	Research group (n = 39)	Control group (n = 39)	t/χ2	P value
Age (years)	58.31 ± 7.30	55.69 ± 6.52	1.672	0.099
Sex (male/female)	12/27	18/21	1.950	0.163
Tumor diameter (cm)	2.33 ± 0.99	1.95 ± 0.68	1.976	0.052
Lymphatic vessel infiltration (positive/negative)	8/31	9/30	0.075	0.784
Differentiation degree (high differentiation/moderate-low differentiation)	6/33	5/34	0.106	0.745
Preoperative imaging staging (stage I/stage II)	5/34	4/35	0.126	0.723