Table 2 The odds ratio (95% confidence interval) of breast cancer based on the different high protein scores in tertiles or per increment of one standard deviation among the study population

High-protein-low-CHO and fat diet

    Median score, SD

12.0

17.0

21.0

-

3.83

-

    Case/total

58 / 138

36 / 133

40 / 130

-

134 / 401

-

    Model 1^a

1.00 (Ref)

0.52 (0.31–0.89)

0.65 (0.39–1.08)

0.068

0.80 (0.65–1.00)

0.045

    Model 2^b

1.00 (Ref)

0.45 (0.26–0.78)

0.58 (0.34–1.00)

0.031

0.77 (0.61–0.96)

0.022

    Model 3^c

1.00 (Ref)

0.39 (0.22–0.69)

0.48 (0.27–0.85)

0.008

0.71 (0.56–0.90)

0.005

High-protein and CHO-low-fat score

    Median score, SD

10.0

18.0

24.0

-

6.73

-

    Case/total

58 / 156

42 / 118

34 / 127

-

134 / 401

-

    Model 1^a

1.00 (Ref)

0.96 (0.57–1.60)

0.66 (0.39–1.11)

0.143

0.85 (0.69–1.06)

0.146

    Model 2^b

1.00 (Ref)

0.91 (0.53–1.55)

0.63 (0.36–1.10)

0.115

0.81 (0.64–1.02)

0.070

    Model 3^c

1.00 (Ref)

0.84 (0.49–1.45)

0.58 (0.33–1.01)

0.061

0.76 (0.60–0.97)

0.026

High-protein and fat-low-CHO score

    Median score, SD

10.0

17.0

23.0

-

5.92

-

    Case/total

49 / 139

43 / 135

42 / 127

-

134 / 401

-

    Model 1^a

1.00 (Ref)

0.82 (0.49–1.37)

0.89 (0.53–1.50)

0.631

0.99 (0.80–1.22)

0.913

    Model 2^b

1.00 (Ref)

0.72 (0.42–1.24)

0.91 (0.52–1.58)

0.655

0.99 (0.79–1.24)

0.941

    Model 3^c

1.00 (Ref)

0.73 (0.42–1.25)

0.91 (0.52–1.59)

0.665

0.99 (0.79–1.24)

0.908