Effect of totally thoracoscopic esophagectomy on postoperative complications and serum inflammatory factors in patients with early esophageal cancer

Table 1 Baseline data of the two patient groups, n (%)

Indicators	Control group (n = 55)	Research group (n = 58)	χ2/t	P value
Sex	-	-	0.658	0.417
Male	30 (54.55)	36 (62.07)	-	-
Female	25 (45.45)	22 (37.93)	-	-
Age (year), mean ± SD	45.53 ± 6.98	46.31 ± 7.44	0.574	0.567
BMI (kg/m2), mean ± SD	22.04 ± 1.45	21.64 ± 1.72	1.333	0.185
Lesion diameter (cm), mean ± SD	2.20 ± 0.59	2.12 ± 0.88	0.564	0.574
Place of residence	-	-	0.404	0.525
Urban	40 (72.73)	39 (67.24)	-	-
Rural	15 (27.27)	19 (32.76)	-	-

BMI: Body mass index.