Table 2 Hazard ratios^a per SD of breast density assessments and breast cancer risk, by view and machine type

Hologic DA

1.44 (1.33–1.56)

1.28 (1.19–1.38)

1.47 (1.36–1.58)

GE DA

1.24 (1.06–1.46)

1.22 (1.04–1.43)

1.33 (1.11–1.58)

Combined^c DA

1.36 (1.18–1.57)

1.27 (1.18–1.36)

1.44 (1.33–1.55)

Hologic NDA

0.85 (0.76–0.94)

0.87 (0.78–0.96)

0.80 (0.72–0.89)

GE NDA

0.85 (0.68–1.07)

0.92 (0.74–1.14)

0.87 (0.70–1.09)

Combined^c NDA

0.85 (0.77–0.93)

0.88 (0.80–0.96)

0.81 (0.74–0.89)

Hologic PD

1.52 (1.39–1.67)

1.35 (1.23–1.48)

1.61 (1.47–1.77)

GE PD

1.31 (1.08–1.58)

1.25 (1.04–1.50)

1.39 (1.13–1.70)

Combined^c PD

1.44 (1.26–1.66)

1.33 (1.22–1.44)

1.54 (1.34–1.77)