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Table 2 Hazard ratios of cancer recurrence and survival outcome based on MBD quartiles (n = 121 case-control pairs)

From: High mammographic breast density predicts locoregional recurrence after modified radical mastectomy for invasive breast cancer: a case-control study

  Locoregional recurrence Distance metastasis Death
HR 95% CI P value* HR 95% CI P value* HR 95% CI P value*
MBD quartiles          
 1, 2 (0–50%) 1.0    1.0    1.0   
 3 (50–75%) 3.1 1.1–9.8 0.043 5.7 0.0–21.9 0.492 3.2 0.9–10.1 0.062
 4 (75–100%) 5.7 1.2–34.9 0.048 10.4 0.8–37.2 0.311 2.2 0.3–13.7 0.409
  1. MBD mammographic breast density, HR hazard ratio, CI confidence interval. *Significance tested using conditional logistic regression analyses by stratified Cox model. P value <0.05 was considered statistically significant