Table 2

Frequency of GSTT1 null genotype by agea

Age, yr (no. of matched pairs)
<65 (n = 54)65–75 (n = 73)>75 (n = 50)
Cases15/54 (27.7%)14/73 (19%)6/50 (12%)
Controls12/54 (22%)12/73 (16.4%)6/50 (12%)
  • a The values given are actual numbers with percentage frequencies in parentheses. χ2 test for trend gave P = 0.14 for the cases.