Cigarette smoking, dietary habits and genetic polymorphisms in GSTT1, GSTM1 and CYP1A1 metabolic genes: A case-control study in oncohematological diseases

Table 2 Allele and genotype frequencies for CYP1A1 *2A polymorphism, and GSTT1/GSTM1 null polymorphisms

	Cases n = 125	Controls n = 310
Allele frequencies
CYP1A1
T	0.7	0.65
C	0.3	0.35
Genotype frequencies (n)
GSTT1*null	0.18 (22)	0.18 (55)
GSTM1*null	0.5 (61)	0.47 (140)
CYP1A1
TT	0.53 (64)	0.47 (140)
TC	0.34 (42)	0.37 (113)
CC	0.13 (16)	0.16 (47)