Risk factors and clinical prediction models for short-term recurrence after endoscopic surgery in patients with colorectal polyps

Table 1 Demographic characteristics of patients

Variables	Total (n = 362)	Non-relapse group (n = 196)	Relapse group (n = 166)	Statistic	P value
Age, mean ± SD	53.32 ± 9.80	51.83 ± 9.34	55.08 ± 10.07	t = -3.18	0.002
BMI, mean ± SD	24.29 ± 3.17	24.12 ± 3.15	24.49 ± 3.18	t = -1.08	0.280
Sex, n (%)				χ2 = 2.14	0.144
Female	139 (38.40)	82 (41.84)	57 (34.34)
Male	223 (61.60)	114 (58.16)	109 (65.66)
Hypertension, n (%)				χ2 = 0.50	0.478
No	251 (69.34)	139 (70.92)	112 (67.47)
Yes	111 (30.66)	57 (29.08)	54 (32.53)
Diabetes, n (%)				χ2 = 1.10	0.293
No	329 (90.88)	181 (92.35)	148 (89.16)
Yes	33 (9.12)	15 (7.65)	18 (10.84)
Hyperlipidemia, n (%)				χ2 = 1.60	0.205
No	304 (83.98)	169 (86.22)	135 (81.33)
Yes	58 (16.02)	27 (13.78)	31 (18.67)
Family history, n (%)				χ2 = 0.12	0.725
No	280 (77.35)	153 (78.06)	127 (76.51)
Yes	82 (22.65)	43 (21.94)	39 (23.49)
Smoking, n (%)				χ2 = 5.95	0.015
No	308 (85.08)	175 (89.29)	133 (80.12)
Yes	54 (14.92)	21 (10.71)	33 (19.88)
Drinking, n (%)				χ2 = 3.91	0.048
No	289 (79.83)	164 (83.67)	125 (75.30)
Yes	73 (20.17)	32 (16.33)	41 (24.70)

BMI: Body mass index.