Vegetable/fruit, smoking, glutathione S-transferase polymorphisms and risk for colorectal cancer in Taiwan

Table 1 Selected colorectal cancer case and control distribution by sex in Taiwan.

Variable	Men		P1	Women		P1
	Casesn = 410 (%)	Controlsn = 409 (%)		Cases n = 317 (%)	Controlsn = 327 (%)
Age (mean±SD, yr)	60.5±12.2	60.6±12.7		60.2±13.6	60.7±13.4
Colon/rectum, n	185/225			167/150
Physical activity	53 (14.1)	95 (23.2)	<0.01	NI2
Coffee	63 (16.5)	36 ( 8.8)	<0.01	NI2
Smoking			0.18	NA3
Never	122 (31.3)	150 (36.7)
Ex-smoker	91 (23.3)	98 (24.0)
Current	177 (45.4)	161 (39.4)
Alcohol drinking			0.01	NA3
Never	186 (48.1)	205 (50.1)
Ex-drinker	17 (4.4)	37 (9.1)
Current			184 (47.6)	167 (40.8)
High staple4	NI2			156(49.2)	112 (34.3)	<0.01
High meat4	294 (71.7)	244 (59.7)	<0.01	203 (64.0)	151 (46.2)	<0.01
High vegetable/fruit4	168 (44.7)	266 (65.0)	<0.01	147 (50.2)	197 (60.2)	0.01
Fish/shrimp (almost everyday)	174 (46.3)	256 (62.6)	<0.01	125 (42.8)	167 (51.1)	0.04
GSTM1 null	213 (52.2)	215 (52.7)	0.89	189 (60.0)	195 (60.0)	1.00
GSTT1 null	216 (52.9)	189 (46.3)	0.06	180 (57.1)	171 (52.6)	0.25
GSTP1			0.78			0.39
A/A	277 (67.9)	287 (70.2)		224 (71.3)	226 (69.5)
A/G	117 (28.7)	109 (26.7)		84 (26.8)	87 (26.8)
G/G	14 (3.4)	13 (3.2)		6(1.9)	12 (3.7)

¹χ²; ²Not included as covariates in the multiple logistic regression model; ³Not available for analysis; ⁴The cut-point of score using the median of the score distribution among controls for high consumption of staple, meat and vegetable/fruit were <10, <5 and <3 respectively.