Table 2.

Lifestyle and dietary factors between case and control groups

Variables		Case	Control	P	Crud OR (95%CI)
Smoking	Non-smoker	349 (71.7)	382 (76.1)	0.006	Ref.
	Current smoker	120 (24.6)	88 (17.5)		1.49 (1.09,2.04)
Physical activities	Previous smoker	18 (3.7)	32 (6.4)		0.62 (0.34,1.11)
	< 120 min/week	323 (90.5)	301 (93.2)	0.353	Ref.
	120~ 180 min/week	30 (8.4)	18 (5.6)		1.55 (0.85,2.84)
	> 180 min/week	4 (1.1)	4 (1.2)		0.93 (0.23,3.76)
Food intake frequencies(times/week)
Meat	Never	159 (32.6)	229 (45.6)	< 0.001	Ref.
	1~ 2	215 (44.1)	209 (41.6)		1.48 (1.12,1.96)
	3~ 4	81 (16.6)	51 (10.2)		2.29 (1.53,3.43)
	≥5	32 (6.6)	13 (2.6)		3.55 (1.80,6.97)
Viscera	Never	225 (46.2)	273 (54.4)	0.207	Ref.
	1~ 2	223 (47.8)	206 (41.0)		1.37 (1.06,1.78)
	3~ 4	22 (4.9)	16 (3.2)		1.82 (0.94,3.51)
	≥5	5 (1.0)	7 (1.4)		0.87 (0.27,2.77)
Fried food	Never	143 (29.4)	184 (36.7)	0.109	Ref.
	1~ 2	265 (54.4)	247 (49.2)		1.38 (1.04,1.83)
	3~ 4	66 (13.6)	58 (11.6)		1.46 (0.97,2.22)
	≥5	13 (2.7)	13 (2.6)		1.29 (0.58,2.86)
Vegetables	Never	13 (2.7)	12 (2.4)	0.550	Ref.
	1~ 2	53 (10.9)	48 (9.6)		1.08 (0.49,2.41)
	3~ 4	97 (19.9)	118 (23.5)		1.10 (0.73,1.68)
	≥5	324 (66.5)	324 (64.5)		0.82 (0.60,1.12)
Fruits	Never	42 (8.6)	35 (7.0)	0.601	Ref.
	1~ 2	122 (25.1)	121 (24.1)		0.84 (0.50,1.41)
	3~ 4	108 (22.2)	147 (29.3)		0.61 (0.37,1.02)
	≥5	215 (44.1)	199 (39.6)		0.90 (0.55,1.47)
Alcohol drink	< 1	434 (89.0)	447 (89.0)	0.971	Ref.
	≥1	53 (10.9)	55 (11.0)		0.97 (0.67,1.48)
Tea	< 1	326 (66.9)	340 (67.7)	0.791	Ref.
	≥1	161 (33.1)	162 (32.3)		1.04 (0.80,1.35)

Ref. The reference group

Binary logistic regression was used to obtain the crud odds ratios OR and its 95% CI