Table 3.

Comparison of CYP1A2 SNP and allele frequencies in 49 colorectal cancer cases and 65 controls.

	Cases			Controls
SNP/allele	n	%	(95% CI)	n	%	(95% CI)	P-value*
SNPs
−3858G→A (CYP1A2*1C)	1	1.02	0.00–6.15	1	0.77	0.00–4.67	1.00
−2464T→delT (CYP1A2*1D)	4	4.08	0.74–10.9	7	5.38	1.75–11.5	0.76
−740T→G (CYP1A2*1E and *1G)	0	0.00	0.00–4.21	1	0.77	0.00–4.67	1.00
−164A→C (CYP1A2*1F)	32	32.7	22.1–44.0	44	33.8	24.5–43.7	0.89
63C→G (CYP1A2*2)	0	0.00	0.00–4.21	0	0.00	0.00–3.19	1.00
1545T→C (CYP1A2*1B, *1G, *1H and *3)	36	36.7	25.7–48.2	51	39.2	29.5–49.2	0.78
Allelic constellations
−3858G −2464T −740T −164A 63C 1545T	62	63.3	51.1–73.7	79	60.8	50.3–70.1	0.78
−3858G −2464T −740T −164C 63C 1545C	32	32.7	22.1–44.0	44	33.8	24.5–43.7	0.89
−3858G −2464delT −740T −164A 63C 1545C	3	3.06	0.34–9.39	5	3.85	0.92–9.37	1.00
−3858A −2464delT −740T −164A 63C 1545C	1	1.02	0.00–6.15	1	0.77	0.00–4.67	1.00
−3858G −2464delT −740G −164A 63C 1545C	0	0.00	0.00–4.21	1	0.77	0.00–4.67	1.00

95% CI, 95% confidence interval.

^*P-values derived from two-sided Fisher's exact test.