Table 1. The genotype and allele frequency and odds ratios (OR) of the SOD A35C, CAT C-262T and GSHPX1Pro197Leu polymorphisms in patients with inflammatory bowel disease (IBD) and Crohn’s disease and ulcerative colitis compared to control group.

	Controls n=245	IBD n=200	OR (95% CI) p-value	Crohn’s disease n=95	OR (95% CI) p-value	Ulcerative colitis n=95	OR (95% CI) p-value
SOD A35C genotype
A/A	208 (0.85)	186 (0.93)	Ref.	89 (0.94)	Ref.	97 (0.92)	Ref.
A/C	36 (0.15)	14 (0.07)	0.43(0.23-0.83) p=0.01	6 (0.06)	0.39(0.16-0.96) p=0.034	8 (0.08)	0.48(0.21-1.06) p=0.066
C/C	1 (0.00)	0 (0.00)	-	0 (0.00)	-	0 (0.00)	-
allele
A	452 (0.92)	386 (0.97)	Ref.	184 (0.97)	Ref.	202 (0.96)	Ref.
C	38 (0.08)	14 (0.04)	0.43(0.23-0.81) p=0.007	6 (0.03)	0.39(0.16-0.93) p=0.029	8 (0.04)	0.47(0.22-1.03) p=0.053
CATC-262T genotype
C/C	151 (0.62)	130 (0.65)	Ref.	59 (0.62)	Ref.	73 (0.70)	Ref.
C/T	79 (0.32)	59 (0.30)	0.85(0.38-1.92) p=0.699	30 (0.32)	0.97(0.57-1.63) p=0.92	27 (0.26)	0.71(0.42-1.19) p=0.188
T/T	15 (0.06)	11 (0.06)	0.98(0.42-2.29) p=1.000	6 (0.06)	1.02(0.38-2.76) p=1.000	5 (0.05)	0.69(0.24-1.97) p=0.484
allele
C	381 (0.78)	319 (0.80)	Ref.	148 (0.78)	Ref.	173 (0.82)	Ref.
T	109 (0.22)	81 (0.20)	0.89 (0.64-1.23) p=0.471	42 (0.22)	0.99 (0.66-1.48) p=1.000	37 (0.18)	0.75(0.49-1.13) p=0.167
GSHPX1
Pro197Leu genotype
C/C	46 (0.19)a)	68 (0.34)	Ref.	33 (0.34)	Ref.	37 (0.36)	Ref.
C/T	172 (0.70)	115 (0.58)	0.45(0.29-0.7) p=0.0004	55 (0.57)	0.46(0.26-0.77) p=0.003	58 (0.56)	0.42(0.25-0.71) p=0.001
T/T	27 (0.11)	17 (0.09)	0.43(0.21-0.87) p=0.018	9 (0.09)	0.46(0.19-1.12) p=0.083	8 (0.08)	0.37(0.15-0.91) p=0.027
allele
C	264 (0.54)	251 (0.63)	Ref.	121 (0.62)	Ref.	132 (0.64)	Ref.
T	226 (0.46)	149 (0.37)	0.69(0.53-0.91) p=0.008	73 (0.38)	0.70(0.50-0.99) p=0.043	74 (0.36)	0.65(0.47-0.92) p=0.013

^ap<0.05 distribution not consistent with Hardy-Weinberg equilibrium