Table 1 Patient and tumor characteristics
From: Is the use of preoperative breast MRI predictive of mastectomy?
| Â | MRI (n = 628) | No MRI (n = 817) | P-value |
|---|---|---|---|
Age, years | Â | Â | Â |
  Mean | 53 | 60 | <0.001 |
  <50 | 43% | 26% | <0.001 |
  >50 | 56% | 73% | <0.001 |
Ethnicity | Â | Â | Â |
  Asian | 3% | 2% | NS |
  Black | 8% | 12% | NS |
  Hispanic | 6% | 4% | NS |
  White | 78% | 79% | NS |
  Other/unknown | 5% | 3% | NS |
Stage | Â | Â | Â |
  0 | 23% | 27% | 0.08 |
  1 | 39% | 39% | NS |
  2 | 29% | 22% | NS |
 3 | 7% | 8% | NS |
 4 | 2% | 3% | NS |
Tumor size (cm) | 1.6 | 1.5 | NS |
Histology | Â | Â | Â |
  DCIS | 24% | 26% | NS |
  Infiltrating ductal | 59% | 53% | NS |
  Infiltrating lobular | 12% | 11% | NS |
  Other | 5% | 10% | NS |