Table 1.

Comparison of general information between the two groups (x̅ ± sd)

Index		Observation group	Control group	t	P
Case (n)		55	55
Age (year)		41.6±7.3	40.9±7.2	7.164	0.259
Male: female		24:31	22:33	0.149	0.699
Course of disease (year)		3.43±1.47	3.14±1.25	2.351	0.194
BMI (kg/m2)		24.52±1.33	24.98±1.39	1.773	0.079
Tumor location	Left	28	32	9.783	9.783
	Right	27	23
Tumor diameter (cm)		0.74±0.16	0.72±0.13	7.302	0.129

Note: BMI: Body Mass Index.