Distribution of age at diagnosis. (A) By exposure dose categories. The horizontal bar indicates the median age at diagnosis: 68.1 years in those exposed to 0 to 0.01 Gy; 68.0 years in those exposed to 0.01 to 0.1 Gy; and 65.5 years in those exposed to more than 0.1 Gy. (B) By exposure dose categories and exposure age categories. The points indicate the mean values and the whiskers indicate the standard errors. (C) By age at exposure. Red circles indicate each patient exposed to doses of more than 0.1 Gy; diamonds, each patient exposed to doses between 0.01 and 0.1 Gy; and triangles, each patient exposed to doses less than 0.01 Gy.