Risk factors and clinical prediction models for short-term recurrence after endoscopic surgery in patients with colorectal polyps

Table 2 Differences in clinical characteristics between the two groups, n (%)

Variables	Total (n = 362)	Non-relapse group (n = 196)	Relapse group (n = 166)	Statistic	P value
H. pylori infection				χ2 = 11.15	< 0.001
No	252 (69.61)	151 (77.04)	101 (60.84)
Yes	110 (30.39)	45 (22.96)	65 (39.16)
Gastric polyp				χ2 = 0.19	0.663
No	317 (87.57)	173 (88.27)	144 (86.75)
Yes	45 (12.43)	23 (11.73)	22 (13.25)
Polyp diameter				χ2 = 2.86	0.091
≤ 2 cm	239 (66.02)	137 (69.90)	102 (61.45)
> 2 cm	123 (33.98)	59 (30.10)	64 (38.55)
Polyp number				χ2 = 5.75	0.016
≤ 2	231 (63.81)	136 (69.39)	95 (57.23)
> 2	131 (36.19)	60 (30.61)	71 (42.77)
Polyp location				χ2 = 1.76	0.184
Distal colon	186 (51.38)	107 (54.59)	79 (47.59)
Proximal colon	176 (48.62)	89 (45.41)	87 (52.41)
Polyp color				χ2 = 0.71	0.400
Rubedo	303 (83.70)	167 (85.20)	136 (81.93)
Non-redness	59 (16.30)	29 (14.80)	30 (18.07)
Polyp morphology				χ2 = 5.26	0.022
Pedunculated or subpedunculated	95 (26.24)	61 (31.12)	34 (20.48)
Sessile	267 (73.76)	135 (68.88)	132 (79.52)
Excision mode				χ2 = 0.22	0.638
EMR	281 (77.62)	154 (78.57)	127 (76.51)
Others	81 (22.38)	42 (21.43)	39 (23.49)
Intraoperative bleeding				χ2 = 1.11	0.292
No	327 (90.33)	180 (91.84)	147 (88.55)
Yes	35 (9.67)	16 (8.16)	19 (11.45)
Pathological type				χ2 = 17.29	< 0.001
Others	126 (34.81)	87 (44.39)	39 (23.49)
Adenomatous	236 (65.19)	109 (55.61)	127 (76.51)

H. pylori: Helicobacter pylori; EMR: Endoscopic mucosal resection.