Clinical analysis of cold vs hot snare polypectomy for 10-19 mm non-pedunculated colorectal polyps

Table 1 Comparison of baseline characteristics and polyp pathology between the two groups

	Study group (n = 843)	Control group (n = 843)	χ2/t value	P value
Sex (male/female)	562/281	534/309	χ2 = 2.046	0.153
Age (years)	61.12 ± 21.09	60.75 ± 23.24	t = 0.34	0.734
Number of polyps	1206	1317
Maximum polyp diameter (mm)	12.49 ± 2.64	12.35 ± 2.42	t = 1.386	0.165
Polyp location, n (%)			χ2 = 1.52	0.912
Cecum	60 (5.0)	64 (4.9)
Ascending colon	241 (20.0)	270 (20.5)
Transverse colon	192 (15.9)	207 (15.7)
Descending colon	229 (19.0)	267 (20.3)
Sigmoid colon	428 (35.5)	443 (33.6)
Rectum	56 (4.6)	66 (5.0)
Paris classification, n (%)			χ2 = 2.11	0.348
0-Isp	354 (29.4)	345 (26.2)
0-Is	396 (32.8)	452 (34.3)
0-IIa	456 (37.8)	520 (39.5)
Histology			χ2 = 0.73	0.867
Tubular adenoma	735 (60.9)	806 (61.2)
Tubulovillous adenoma	229 (19.0)	248 (18.8)
Hyperplastic polyp	183 (15.2)	207 (15.7)
Serrated polyp/adenoma	59 (4.9)	56 (4.3)

Table 2 Differences in intraoperative outcomes between the two groups

	Study group (polyps = 1206)	Control group (polyps = 1307)	χ2/t value	P value
Histological complete resection rate, n (%)	1155 (95.8)	1276 (97.6)	χ2 = 2.372	0.123
Polyp resection time (seconds)	76.52 ± 23.67	91.24 ± 32.06	t = 13.19	< 0.001
Immediate intraoperative bleeding, n (%)	153 (12.7)	64 (4.9)	χ2 = 49.08	< 0.001

Table 3 Differences in health expenses between the two groups

	Study group (polyps = 1206)	Control group (polyps = 1307)	χ2/t value	P value
Treatment cost (CNY)	4708.33 ± 809.25	8704.91 ± 762.30	127.3	< 0.001
Hospital stays (day)	2.42 ± 0.61	3.21 ± 1.02	23.72	< 0.001