Retrospective Cohort Study
Copyright ©The Author(s) 2018.
World J Gastroenterol. Feb 28, 2018; 24(8): 905-916
Published online Feb 28, 2018. doi: 10.3748/wjg.v24.i8.905
Table 4 Risk factors for post-polypectomy colorectal cancer distinct from index AA/TSA/ASSA site
Risk factorsUnivariate analysis, HR (95%CI)P valueMultivariate analysis, HR (95%CI)P value
Male sex (M:F)0.79 (0.40-1.57)0.50--
Age at polypectomy (≥ 70)3.68 (1.82-7.48)< 0.013.02 (1.23-7.41)0.02
Polyp size (≥ 20 mm)1.93 (0.77-4.83)0.16--
Degree of dysplasia (High: Low)1.41 (0.65-3.08)0.39--
Polyp location (Left colon: Right)0.15 (0.07-0.34)< 0.010.23 (0.08-0.63)< 0.01
Polyp location (Rectum:Right colon)0.22 (0.07-0.68)< 0.010.23 (0.05-1.00)0.05
Number of polyps resected at polypectomy (> 3 polyps)2.94 (1.14-7.54)0.034.05 (1.38-11.90)0.01
Polypectomy device used (Hot snare:Cold snare)0.64 (0.22-2.34)0.24--
Polyp shape (Flat/sessile: Pedunculated)8.0 (2.62-24.05)< 0.013.92 (1.10-14.04)0.04
Piecemeal removal (Yes:No)1.68 (0.67-4.22)0.27--
Injection-assisted EMR (Yes:No)0.70 (0.19-2.60)0.59--