Table 3.

Adjusted HR from Cox proportional hazards models for screening mammogram result, overall and stratified by breast density groups

BI-RADS breast density
Prior mammogram result, recommendationOverall aHR (95% CI)aAlmost entirely fat aHR (95% CI)bScattered fibroglandular aHR (95% CI)bHeterogeneously dense aHR (95% CI)bExtremely dense aHR (95% CI)b
True-negativeRef.Ref.Ref.Ref.Ref.
False-positive, additional imaging1.39 (1.35–1.44)1.70 (1.42–2.04)1.44 (1.37–1.52)1.34 (1.28–1.40)1.44 (1.31–1.58)
False-positive, biopsy1.76 (1.65–1.88)1.76 (1.17–2.66)1.75 (1.56–1.95)1.74 (1.59–1.91)1.87 (1.53–2.27)
  • aaHR is adjusted HR with adjustment for age, race/ethnicity, history of breast biopsy, family history of breast cancer, previous mammogram interval, menopause status, and stratified by BI-RADS breast density.

  • baHR is adjusted HR for age, race/ethnicity, history of breast biopsy, family history of breast cancer, previous mammogram interval, and menopause status.