Table 2.

Risk factors for colorectal cancer at AA/TSA/ASSA resection site

Risk factors	Univariate analysis, HR (95%CI)	P value	Multivariate analysis, HR (95%CI)	P value
Male sex (M:F)	1.74 (1.01-2.98)	0.04	2.87 ( 1.14-6.81)	0.03
Age at polypectomy (≥ 70)	2.51 (1.47-4.27)	< 0.01	2.31 (1.04-5.12)	0.04
Polyp size (≥ 20 mm)	2.60 (1.17-5.78)	0.02	3.70 (1.07-12.77)	0.04
Degree of Dysplasia (High:Low)	1.90 (1.06-3.41)	0.03	2.59 (1.09-6.18)	0.03
Polyp location (Left colon: Right colon)	0.10 (0.04-0.22)	< 0.01	0.09 (0.03-0.29)	< 0.01
Polyp location (Rectum: Right colon)	0.47 (0.22-1.02)	0.06	-	-
Number of polyps resected at polypectomy (> 3 polyps)	2.40 (1.10-5.24)	0.03	5.94 (1.98-17.79)	< 0.01
Polypectomy device used (Hot snare: Cold snare)	1.24 (0.49-3.75)	0.46	-	-
Polyp shape (Flat: Pedunculated)	6.15 (2.67-14.15)	< 0.01	2.79 (0.94-15.23)	0.06
Piecemeal removal (Yes:No)	2.80 (1.44-5.46)	< 0.01	5.42 (1.82-16.20)	0.01
Injection-assisted endoscopic mucosal resection (EMR) (Yes:No)	2.15 (0.98-4.68)	0.06	-	-

EMR: Endoscopic mucosal resection.