Table 2.
Five-year and 10-year event rates in the MT and BCS + WBI groups
| Event | MT alone | BCS + WBI | ||||
|---|---|---|---|---|---|---|
| Events | 5-year | 10-year | Events | 5-year | 10-year | |
| Ipsilateral breast tumor recurrence | 117 | 3.72 (2.94–4.63) | 6.66 (5.45–8.02) | 131 | 3.65 (2.87–4.55) | 7.95 (6.50–9.58) |
| Lymph node recurrence | 82 | 2.89 (2.21–3.71) | 4.40 (3.50–5.46) | 40 | 1.19 (0.78–1.76) | 2.41 (1.72–3.29) |
| Distant recurrence | 277 | 9.31 (8.07–10.7) | 15.3 (13.6–17.1) | 262 | 9.51 (8.25–10.9) | 16.2 (14.2–18.2) |
| Contralateral breast cancer | 45 | 0.62 (0.34–1.06) | 2.46 (1.73–3.40) | 59 | 1.30 (0.87–1.89) | 3.85 (2.82–5.13) |
| Breast cancer-related death | 229 | 5.32 (4.38–6.38) | 12.1 (10.6–13.8) | 214 | 5.07 (4.16–6.12) | 14.1 (12.1–16.2) |
| Any death | 248 | 5.57 (4.61–6.66) | 13.0 (11.4–14.7) | 236 | 5.57 (4.61–6.65) | 15.6 (13.5–17.8) |
Data are no. or percent rate (95% confidence interval)
BCS breast-conserving surgery, MT mastectomy, WBI whole-breast irradiation