Construction and analysis of an ulcer risk prediction model after endoscopic submucosal dissection for early gastric cancer

Table 1 Comparison of general information of ulcer group and non-ulcer group, n (%)

General Information	Ulcer group (n = 40)	Non-ulcer group (n = 156)	t/χ2 value	P value
Sex			0.83	0.362
Male	26 (65.00)	89 (57.05)
Female	14 (35.00)	67 (42.95)
Age	48.98 ± 8.23	47.11 ± 9.02	1.257	0.213
BMI	22.25 ± 2.01	21.83 ± 1.98	1.183	0.242
Course of disease (yr)	2.85 ± 0.48	2.66 ± 0.52	2.195	0.032
History of H. pylori infection	7 (17.50)	11 (7.05)	4.168	0.041
Family history of GC	8 (20.00)	22 (14.10)	0.854	0.355
Drinking history	9 (22.50)	26 (16.67)	0.739	0.39
Smoking history	24 (60.00)	66 (42.31)	4.013	0.045
Comorbidities
Hypertension	9 (22.50)	26 (16.67)	0.739	0.39
Diabetes	6 (15.00)	22 (14.10)	0.021	0.885
Coronary heart disease	7 (17.50)	23 (14.75)	0.187	0.666
Residence			0.116	0.733
Rural	25 (62.50)	102 (65.38)
Town	15 (37.50)	54 (34.62)
Medication history
Aspirin	12 (30.00)	28 (17.95)	2.847	0.092
Clopidogrel	19 (47.50)	27 (17.31)	16.158	< 0.001

BMI: Body mass index; H. pylori: Helicobacter pylori; GC: Gastric cancer.