Table 2

Distribution of genetic polymorphisms available in the data set

GeneControls n (%)Cases n (%)
CYP1A1 (*2,*3,*4,*5)5186 (55.5)5839 (59.6)
CYP2E1 (*2,*3,*4,*5,*6)2430 (26.0)2727 (27.8)
CYP2D6 (*3,*4A,*4B,*4C,*5,*6,*10,*16,*2×N, *2×2,*4×2)2828 (30.0)3997 (40.8)
GSTM1 6832 (73.1)7735 (79.0)
GSTT1 3316 (35.5)4871 (49.7)
NAT2 (*4,*5A,*5B,*5C,*6A,*6B,*7A,*7B,*14A)2375 (25.4)1734 (17.7)
Multiple genesa
 Two genes2347 (25.0)2476 (25.3)
 Three genes2555 (27.0)1670 (17.1)
 Four genes1590 (17.0)2274 (23.2)
 Five or more genes433 (4.7)1111 (11.3)
  • a These refer to any combination of the above genes.