Table 5 Association between percentage density (≥25% compared with <25%) and local recurrence stratified on surgical method
From: Possible influence of mammographic density on local and locoregional recurrence of breast cancer
| Â | Breast-conserving surgery | Mastectomy | ||||
|---|---|---|---|---|---|---|
Local recurrence | 41 events Time at risk = 5,959 years | 21 events Time at risk = 3,734 years | ||||
| Â | HR | CI | P value | HR | CI | P value |
Model 1a | 1.53 | 0.70-3.31 | 0.286 | 3.44 | 1.26-9.38 | 0.016 |
Model 2b | 1.48 | 0.67-3.25 | 0.334 | 2.93 | 1.03-8.39 | 0.045 |
Locoregional recurrence | 61 events Time at risk = 5,924 years | 42 events Time at risk = 3,690 years | ||||
| Â | HR | CI | P value | HR | CI | P value |
Model 1a | 1.45 | 0.78-2.70 | 0.242 | 2.69 | 1.34-5.43 | 0.006 |
Model 2b | 1.57 | 0.83-2.97 | 0.166 | 2.16 | 1.02-4.54 | 0.044 |