Table 2.

Allele frequency of CYP11A(TAAAA)n polymorphism in cases and controls, the Shanghai Breast Cancer Study

Number of TAAAA repeatsLength of PCR product (bp)Cases
Controls
P value
N%N%
Four26047723.5052424.210.586
Six270127662.86142665.900.040
Seven27530.1580.370.160
Eight28025512.561838.46<0.0001
Nine28570.34110.510.418
Ten29090.4470.320.529
OthersOthers30.1550.230.537
No. of chromosomes2030100.002164100.00
χ2 = 22.02, df = 6, P = 0.001