| Radiation (n = 56) | Surveillance (n = 61) | P value |
---|---|---|---|
Follow–up months |  |  | <0.01 |
  mean ± SD (range) | 174 ± 54 (16–339) | 67 ± 50 (5–257) | |
Era n (%) | Â | Â | <0.001 |
  1980s | 12 (80.0%) | 3 (20.0%) | |
  1990s | 42 (91.3%) | 4 (8.7%) | |
  2000s | 2 (3.5%) | 54 (94.7%) | |
Relapse | Â | Â | 0.19 |
  n (%) | 1 (1.7%) | 4 (6.6%) | |
  Site | chest wall 1 | lymph-node 4 | |
 |  | liver 1 | |
  Time to relapse | 16 months | 5–7 (mean 7) | |
Treatment after relapse | Â | Â | 0.99 |
  Chemotherapy | 1 (100%) | 4 (100%) | |
  Radiation | 0 (0%) | 1 (25%) | |
Prognosis | Â | Â | Â |
  Cause-specific death | 0 (0%) | 0 (0%) | 0.99 |
  Death of other causes | 4 (7.1%) | 1 (1.6%) | 0.13 |