Usefulness of Magnifying Endoscopy with Narrow-Band Imaging for Determining Tumor Invasion Depth in Early Gastric Cancer

Table 1

Patient characteristic of two groups.

	Group V	Group N
No. of patients	18	101
Mean age (years ± SD^†)	68.5 ± 8.6	68.9 ± 9.4	N.S.
Sex (male : female)	14 : 4	81 : 20	N.S.
Mean maximum diameter of lesions (mm ± SD)	18.9 ± 10.2	22.1 ± 17.4	N.S.
Gross type; (elevated type : non-elevated type)	5 : 13	31 : 70	N.S.
Location (U : M : L^‡)	3 : 11 : 4	17 : 36 : 48	N.S.

^†SD: standard deviation.
^‡U: fornix, cardiac part, and upper body, M: middle body and lower body, L: gastric angle and antrum.