Table 1 Cardiac mortality in radiation trials before 1973 and after 1993
| Â | Cardiac deathsa | Hazard ratio (95% confidence interval) |
|---|---|---|
Diagnosed before 1973 | ||
   Follow up <5 years | 230/180 | 1.19 (0.98 to 1.45) |
   Follow up >5 years | 189/145 | 1.21 (0.97 to 1.50) |
Diagnosed after 1993 | ||
   Follow up < 5 years | 230/180 | 0.95 (0.79 to 1.14) |
   Follow up > 5 years | 189/145 | 0.99 (0.73 to 1.50) |