Spectrum of final pathological diagnosis of gastric adenoma after endoscopic resection

Table 5 Comparison of the non-malignancy group and the malignancy group n (%)

	Non-malignancy group	Malignancy group	P value
No. of cases	482 (87.0)	72 (13.0)
No. of patients	462 (86.5)	72 (13.5)
Age (yr), mean ± SD	61.8 ± 9.8	63.7 ± 9.0	0.132
Sex
Male	320 (86.0)	52 (14.0)	0.350
Female	162 (89.0)	20 (11.0)
Histologic grade
Adenoma	86 (93.5)	6 (6.5)	< 0.001
Low grade	360 (94.2)	22 (5.8)
High grade	36 (45.0)	44 (55.0)
Histologic type
Tubulovillous	7 (70)	3 (30)	0.129
Tubular	475 (83.3)	69 (12.7)
No. of Bx, mean ± SD	2.1 ± 1.6	2.9 ± 2.2	< 0.001
No. of biopsy
Undetermined	111 (86.0)	18 (14.0)
1	47 (92.2)	4 (7.8)
2	117 (94.4)	7 (5.6)
3	105 (92.1)	9 (7.9)
4	47 (72.3)	18 (27.7)
5	25 (80.6)	6 (19.4)
6	12 (70.6)	5 (29.4)
7	1 (33.3)	2 (66.7)
8	1 (33.3)	2 (66.7)
3	269 (93.1)	20 (6.9	< 0.001
4	86 (72.3)	33 (27.7)
Mean duration between Bx and procedure (d)	40.9	39.3	0.869
Duration between biopsy and procedure
14 d	24 (92.3)	2 (7.7)	0.658
90 d	29 (87.9)	4 (12.1)
Size (cm), mean ± SD	1.2 ± 0.8	1.5 ± 1.1	0.003
< 1.0	201 (89.7)	23 (10.3)	0.010
> 1.0, < 2.0	218 (87.9)	30 (12.1)
> 2.0	63 (76.8)	19 (23.2)
Morphologic type
Elevated	252 (91.6)	23 (8.4)	< 0.001
Flat	187 (90.8)	19 (9.2)
Depressed	43 (64.2)	24 (35.8)
Y-IV	0 (0)	6 (100)
Color
Whitish	321 (96.7)	11 (3.3)	< 0.001
Reddish	65 (69.1)	29 (30.9)
Mixed or undetermined	96 (75.0)	32 (25.0)
Longitudinal location
Antrum	255 (85.6)	43 (14.4)	0.291
Angle	47 (82.5)	10 (17.5)
Body	173 (90.6)	18 (9.4)
Cardia or fundus	7 (87.5)	1 (12.5)
Circular location
Anterior	104 (84.6)	19 (15.4)	0.573
Posterior	107 (89.9)	12 (10.1)
Lesser curvature	171 (88.6)	22 (11.4)
Greater curvature	95 (84.1)	18 (15.9)
Type of procedure
EMR	371 (95.9)	16 (4.1)	< 0.001
ESD	111 (66.5)	56 (33.5)
Repeat endoscopy
Yes	110 (77.5)	32 (22.5)	< 0.001
No	372 (90.3)	40 (9.7)
Endoscopist
1	397 (85.6)	65 (14.1)	0.204
2	60 (93.8)	4 (6.3)
3	25 (89.3)	3 (10.7)
Pathologist
1	284 (83.5)	56 (16.5)	0.027
2	117 (94.4)	7 (5.6)
3	74 (89.2)	9 (10.8)
Others	6 (100)	0 (0)
Local clinics (> 30 cases)
1	39 (95.1)	2 (4.9)	0.224
2	37 (90.2)	4 (9.8)
3	35 (97.2)	1 (2.8)
4	28 (84.8)	5 (15.2)
Complication
Bleeding	9 (64.3)	5 (35.7)
Perforation	1 (50)	1 (50)
Stricture	1 (50)	1 (50)
Total complications	11 (61.1)	7 (38.9)	0.005
No complications	471 (87.9)	65 (12.1)
Multiplicity
Patient of single case	449 (86.7)	69 (13.3)	0.464
Patient of multiple cases	13 (81.3)	3 (18.8)

Bx: Biopsy; Y: Yamada type; EMR: Endoscopic mucosal resection; ESD: Endoscopic submucosal dissection.