Efficacy-cost analysis of endoscopic mucosal resection and cold snare polypectomy: A propensity score matching analysis

Table 1 Baseline data of patients in the two groups before propensity score matching, n (%)

Items	EMR group (n = 46)	CSP group (n = 54)	χ2/t	P value
Age			1.771	0.183
≥ 60 years	22 (47.83)	33 (61.11)
< 60 years	24 (52.17)	21 (38.89)
Sex			0.100	0.752
Male	27 (58.70)	30 (55.56)
Female	19 (41.30)	24 (44.44)
BMI (kg/m2)	22.48 ± 1.43	22.19 ± 2.68	0.678	0.499
Smoking			3.904	0.048
Yes	27 (58.70)	21 (38.89)
No	19 (41.30)	33 (61.11)
Diabetes mellitus			0.549	0.459
Yes	23 (50.00)	23 (42.59)
No	23 (50.00)	31 (57.41)
Combined hypertension			0.343	0.558
Yes	24 (52.17)	25 (46.30)
No	22 (47.83)	29 (53.70)
Polyp diameter			0.244	0.621
≥ 10 mm	21 (45.65)	22 (40.74)
< 10 mm	25 (54.35)	32 (59.26)
Number of polyps			3.904	0.048
≥ 3	27 (58.70)	21 (38.89)
< 3	19 (41.30)	33 (61.11)
Polyp location			0.362	0.547
Colon	28 (60.87)	36 (66.67)
Rectum	18 (39.13)	18 (33.33)
Pathological type			2.347	0.126
Inflammatory hyperplasia	30 (65.22)	27 (50.00)
Adenomatous	16 (34.78)	27 (50.00)

EMR: Endoscopic mucosal resection; CSP: Cold snare polypectomy; BMI: Body mass index.

Table 2 Baseline data of two groups of patients after propensity score matching, n (%)

Items	EMR group (n = 40)	CSP group (n = 40)	χ2/t	P value
Age,			1.818	0.178
≥ 60 years	25 (62.50)	19 (47.50)
< 60 years	15 (37.50)	21 (52.50)
Sex,			0.051	0.822
Male	22 (55.00)	23 (57.50)
Female	18 (45.00)	17 (42.50)
BMI (kg/m2)	22.55 ± 1.45	21.97 ± 2.68	1.209	0.230
Smoking			0.000	1.000
Yes	21 (52.50)	21 (52.50)
No	19 (47.50)	19 (47.50)
Diabetes mellitus			0.202	0.653
Yes	19 (47.50)	17 (42.50)
No	21 (52.50)	23 (57.50)
Combined hypertension			0.000	1.000
Yes	19 (47.50)	19 (47.50)
No	21 (52.50)	21 (52.50)
Polyp diameter			0.052	0.820
≥ 10 mm	16 (40.00)	17 (42.50)
< 10 mm	24 (60.00)	23 (57.50)
Number of polyps			0.000	1.000
≥ 3	21 (52.50)	21 (52.50)
< 3	19 (47.50)	19 (47.50)
Polyp location			0.220	0.639
Colon	25 (62.50)	13 (32.50)
Rectum	15 (37.50)	27 (67.50)
Pathological type			2.489	0.115
Inflammatory hyperplasia	26 (65.00)	19 (47.50)
Adenomatous	14 (35.00)	21 (52.50)

EMR: Endoscopic mucosal resection; CSP: Cold snare polypectomy; BMI: Body mass index.

Table 3 Single factor analysis of recurrence after endoscopic intestinal polypectomy, n (%)

Items	Recurrence group (n = 38)	Non-recurrence group (n = 62)	χ2/t	P value
Age			4.461	0.035
≥ 60 years	26 (68.42)	29 (46.77)
< 60 years	12 (31.58)	33 (53.23)
Sex			4.938	0.026
Male	27 (71.05)	30 (48.39)
Female	11 (28.95)	32 (51.61)
BMI (kg/m2)	21.96 ± 2.03	22.57 ± 2.26	-1.360	0.177
Smoking			0.261	0.609
Yes	17 (44.74)	31 (50.00)
No	21 (55.26)	31 (50.00)
Diabetes mellitus			0.395	0.530
Yes	19 (50.00)	27 (43.55)
No	19 (50.00)	35 (56.45)
Combined hypertension			2.226	0.136
Yes	15 (39.47)	34 (54.84)
No	23 (60.53)	28 (45.16)
Polyp diameter			5.548	0.019
≥ 10 mm	22 (57.89)	21 (33.87)
< 10 mm	16 (42.11)	41 (66.13)
Number of polyps			10.240	0.001
≥ 3	26 (68.42)	22 (35.48)
< 3	12 (31.58)	40 (64.52)
Polyp location			3.438	0.064
Colon	20 (52.63)	44 (70.97)
Rectum	18 (47.37)	18 (29.03)
Pathological type
Inflammatory hyperplasia	13 (34.21)	44 (70.97)	12.987	< 0.001
Adenomatous	25 (65.79)	18 (29.03)
Surgical approach			3.491	0.062
EMR	22 (57.89)	24 (38.71)
CSP	16 (42.11)	38 (61.29)

EMR: Endoscopic mucosal resection; CSP: Cold snare polypectomy; BMI: Body mass index.

Table 4 Assignment table for multivariate analysis

Variable	Assignment
Age (≥ 60 years)	Yes = 1, No = 0
Sex (male)	Yes = 1, No = 0
Number of polyps (≥ 3)	Yes = 1, No = 0
Polyp diameter (≥ 10 mm)	Yes = 1, No = 0
Pathological type (adenoma)	Yes = 1, No = 0