Table 2

 Net QALYs gained over time in women undergoing breast screening by scenario

ScenarioAt 5 yearsAt 10 yearsAt 20 years
1. Original Forrest report30411893301
2. As 1 updated for breast cancer mortality from eight trials1957643145
3. As 2 with harms added122401536
4. As 3 but with mortality suggested by Gøtzsche and Nielsen6−3170834
5. As 3 but baseline mortality and reductions as in Nelson et al7 8−42271685

QALY=quality adjusted life year.