Epistatic Categories  
model* 1 2  
  OR (95% CI) P
1.1 2.90 (1.39-6.46) 2.51 (1.28-5.30) 0.013
1.2 2.24 (1.03-5.16) 2.68 (1.37-5.65) 0.012
2.1 1.40 (0.84-2.35) 1.39 (0.94-2.04) 0.172
2.2 1.46 (0.96-2.23) 1.31 (0.84-2.04) 0.159
3.1 0.99 (0.60-1.64) - 0.984
3.2 1.25 (0.84-1.87) - 0.270
4 2.60 (1.34-5.46) - 0.004
5 1.39 (0.99-1.97) - 0.061
6 2.62 (1.30-5.64) 2.59 (1.31-5.52) 0.016
7 1.44 (1.00-2.07) 1.15 (0.56-2.31) 0.142
8 1.19 (1.01-1.40) - 0.041
*The names of the models of epistasis represented by each number were described in Table 3.These represent the categories (other than ‘0’, which is the reference) formed by the coding system for each model; “-“ indicates models that only have one category other than the reference.
Table 4: Results of the crude analysis for the association between R72P and T309G SNPs and breast cancer under eight models of epistasis.