Tripartite comparison of single-incision and conventional laparoscopy in cholecystectomy: A multicenter trial

Table 1 General data of the patients

	X-Cone method(n = 100)(No.1 group)	Three-device method(n = 100)(No.2 group)	Conventional method(n = 100)(No.3 group)	P value	Statistical methods and values
Sex
Male	47	44	52		χ2 = 1.31
Female	53	56	48
Age (yr)	39.5 ± 14.5	40.0 ± 12.5	41.7 ± 12.0	0.465	One-Way ANOVA F = 0.768
BMI (kg/m2)	26.1 ± 5.5	28.2 ± 7.5	26.1 ± 8.4	0.06	One-Way ANOVA F = 2.847
Surgical risk grade (ASA)	1.6 ± 0.5	1.6 ± 0.4	1.6 ± 0.4	0.681	One-Way ANOVA F = 0.385
Diagnosis
Stones	58	52	47		χ2 = 2.43
Polyps	42	48	53

ASA: American society of anesthesiology; BMI: Body mass index.