The standardized incidence ratios for males, females, and both sexes combined are shown in tables 4, 5, and 6, respectively. The excess relative risks for males and for both sexes combined are shown in table 7. For many cancer types the excess relative risk estimate has unrealistically wide confidence intervals, or the excess relative risk could not be estimated because the likelihood function had no true maximum. This was caused by the lack of a clear dose trend, often because there were very few high doses. In table 7, the only cancer types listed are those for which more than five cases have a cumulative dose exceeding 4.9 mSv and for which an excess relative risk estimate was found. This excludes most cancer types with very wide confidence intervals. It also excludes all cancer types in females.