Table 1.

Univariate and multivariate logistic-regression analysis on risk factors for polyp recurrence

Characteristic	No. of patients (n = 1,165)	Polyp recurrence (n = 531)	Univariate		Multivariate
			OR (95% CI)	P-value	OR (95% CI)	P-value
Age
<50 years	447	167 (37.4)	1		1
≥50 years	718	364 (50.7)	1.72 (1.36–2.19)	<0.01	1.70 (1.31–2.20)	<0.01
Gender
Female	426	149 (35.0)	1		1
Male	739	382 (51.7)	1.99 (1.56–2.54)	<0.01	1.42 (1.07–1.90)	0.02
Body mass index
<24 kg/m2	668	264 (39.5)	1		1
≥24 kg/m2	497	267 (53.7)	1.78 (1.41–2.25)	<0.01	1.59 (1.23–2.04)	<0.01
Number of polyps
<3	919	366 (39.8)	1		1
≥3	246	165 (67.1)	3.08 (2.29–4.14)	<0.01	1.97 (1.34–2.90)	0.01
Anatomical location
Proximal colon	369	177 (48.0)	1
Distal colon	496	228 (46.0)	0.92 (0.70–1.21)	0.56
Rectum	300	126 (42.0)	0.79 (0.58–1.07)	0.12
Size
<10 mm	907	415 (45.8)	1
≥10 mm	258	116 (45.0)	0.97 (0.73–1.28)	0.97
Pathological type
Serrated polyps	385	177 (46.0)	1
Conventional adenomas	780	354 (45.4)	0.98 (0.76–1.25)	0.98
Coexistence of adenomas and serrated polyps
No	1,053	461 (43.8)	1		1
Yes	112	70 (62.5)	2.14 (1.43–3.20)	<0.01	1.28 (0.81–2.02)	0.28
High-grade dysplasia
No	1,053	479 (45.5)	1
Yes	112	52 (46.4)	1.04 (0.70–1.54)	0.85
Smoker status
Never	909	373 (41.0)	1		1
Current	256	158 (61.7)	2.32 (1.74–3.08)	<0.01	1.52 (1.09–2.13)	0.01
Alcohol consumption
Never	1,086	476 (43.8)	1		1
Current	79	55 (69.6)	2.94 (1.79–4.81)	<0.01	1.84 (1.08–3.16)	0.03
History of hypertension
No	916	393 (42.9)	1		1
Yes	249	138 (55.4)	1.65 (1.25–2.19)	<0.01	1.20 (0.87–1.64)	0.26
History of diabetes
No	1,105	493 (44.6)	1		1
Yes	60	38 (63.3)	2.14 (1.25–3.67)	0.01	1.47 (0.83–2.63)	0.19
Family history of polyps
No	1,068	476 (44.6)	1		1
Yes	97	55 (56.7)	1.63 (1.07–2.48)	0.02	1.65 (1.06–2.59)	0.03
Family history of CRC
No	1,095	486 (44.4)	1		1
Yes	70	45 (64.3)	2.26 (1.36–3.73)	0.01	2.15 (1.26–3.67)	0.01

OR, odds ratio; CI, confidence interval; CRC, colorectal cancer.