Prevalence and Risk Factors of Asymptomatic Colorectal Polyps in Taiwan

Table 2

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

Principal parameter	Hyperplastic polyp (−)	Hyperplastic polyp (+)	𝑃 value
Sex, 𝑛 (%)			0.195
Men	837 (60.7)	139 (66.1)
Women	542 (39.3)	71 (33.9)
Age (yr.), 𝑛 (%)			0.048
<45	318 (23.1)	40 (19.2)
45–60	778 (56.4)	114 (54.1)
>60	283 (20.5)	56 (26.7)
Education (yr.), 𝑛 (%)			0.136
<10	301 (21.8)	43 (20.6)
10–12	539 (39.1)	92 (44.0)
>12	539 (39.1)	75 (35.4)
BMI*,  𝑛 (%)			0.004
<25	949 (68.8)	114 (54.2)
25–30	363 (26.3)	83 (39.4)
>30	67 (4.9)	13 (6.4)
NSAID^† use, 𝑛 (%)			0.836
No	1329 (96.4)	201 (95.9)
Yes	50 (3.6)	9 (4.1)
Family history of colon polyp, 𝑛 (%)			0.368
No	1208 (87.6)	178 (84.9)
Yes	171 (12.4)	32 (15.1)
Smoking status, 𝑛 (%)			<0.001
Never smoking	896 (65.0)	112 (53.3)
Former smoking	200 (14.5)	25 (11.9)
Current smoking	283 (20.5)	73 (34.8)
Alcohol drinking, 𝑛 (%)			0.186
No	1019 (73.9)	148 (70.6)
≦3 times per week	283 (20.5)	45 (21.6)
>3 times per week	77 (5.6)	17 (7.8)
Coffee drinking, 𝑛 (%)			0.924
No	749 (54.3)	122 (58.2)
≦3 times per week	262 (19.0)	38 (17.9)
>3 times per week	368 (26.7)	50 (23.9)
Tea drinking, 𝑛 (%)			0.481
No	513 (37.2)	89 (42.2)
≦3 times per week	298 (21.6)	38 (17.9)
>3 times per week	568 (41.2)	83 (39.9)
Spicy foods consumption, 𝑛 (%)			0.079
No	778 (56.4)	110 (52.3)
≦3 times per week	412 (29.9)	55 (26.4)
>3 times per week	189 (13.7)	45 (21.3)
Betel nut use, 𝑛 (%)			0.728
No	1294 (93.8)	198 (94.5)
Yes	85 (6.2)	12 (5.5)
Exercise habit, 𝑛 (%)			0.867
No	469 (34.0)	70 (33.5)
≦3 times per week	389 (28.2)	63 (29.8)
>3 times per week	521 (37.8)	77 (36.7)
Vegetarian, 𝑛 (%)			0.675
No	1335 (96.8)	202 (96.3)
Yes	44 (3.2)	8 (3.7)
Metabolic syndrome, 𝑛 (%)			0.078
No	1019 (73.9)	140 (66.9)
Yes	360 (26.1)	70 (33.1)

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