Prevalence and Risk Factors of Asymptomatic Colorectal Polyps in Taiwan

Table 4

Univariate analysis of the risk factors for the development of colorectal adenomatous polyps.

Principal parameter	Adenomatous polyp (−)	Adenomatous polyp (+)	𝑃 value
Sex, 𝑛 (%)			0.017
Men	837 (60.7)	219 (71.9)
Women	542 (39.3)	86 (28.1)
Age (yr.), 𝑛 (%)			<0.001
<45	319 (23.1)	39 (12.9)
45–60	778 (56.4)	153 (50.0)
>60	282 (20.5)	113 (37.1)
Education (yr.), 𝑛 (%)			0.015
<10	301 (21.8)	72 (23.7)
10–12	539 (39.1)	150 (49.2)
>12	539 (39.1)	83 (27.1)
BMI*, 𝑛 (%)			0.001
<25	949 (68.8)	161 (52.7)
25–30	363 (26.3)	131 (42.9)
>30	67 (4.9)	13 (4.4)
NSAID^† use, 𝑛 (%)			0.875
No	1329 (96.4)	293 (96.1)
Yes	50 (3.6)	12 (3.9)
Family history of colon polyp, 𝑛 (%)			0.603
No	1208 (87.6)	264 (86.4)
Yes	171 (12.4)	41 (13.6)
Smoking status, 𝑛 (%)			0.011
Never smoking	896 (65.0)	171 (56.2)
Former smoking	200 (14.5)	41 (13.5)
Current smoking	283 (20.5)	93 (30.3)
Alcohol drinking, 𝑛 (%)			0.005
No	1019 (73.9)	214 (70.2)
≦3 times per week	283 (20.5)	50 (16.4)
>3 times per week	77 (5.6)	41 (13.4)
Coffee drinking, 𝑛 (%)			0.126
No	749 (54.3)	177 (58.0)
≦3 times per week	262 (19.0)	59 (19.5)
>3 times per week	368 (26.7)	69 (22.5)
Tea drinking, 𝑛 (%)			0.557
No	513 (37.2)	122 (40.1)
≦3 times per week	298 (21.6)	54 (17.6)
>3 times per week	568 (41.2)	129 (42.3)
Spicy food consumption, 𝑛 (%)			0.123
No	778 (56.4)	177 (58.0)
≦3 times per week	412 (29.9)	72 (23.7)
>3 times per week	189 (13.7)	56 (18.3)
Betel nut use, 𝑛 (%)			0.725
No	1293 (93.8)	284 (93.1)
Yes	86 (6.2)	21 (6.9)
Exercise habit, 𝑛 (%)			0.694
No	469 (34.0)	111 (36.4)
≦3 times per week	389 (28.2)	86 (28.1)
>3 times per week	521 (37.8)	108 (35.5)
Vegetarian, 𝑛 (%)			0.543
No	13358 (96.8)	298 (97.7)
Yes	44 (3.2)	7 (2.3)
Metabolic syndrome, 𝑛 (%)			0.168
No	1019 (73.9)	213 (69.8)
Yes	360 (26.1)	92 (30.2)

∗BMI = body mass index, indicating weight in kg divided by body surface area. ^†NSAID: nonsteroid anti-inflammatory drug.