Probability of developing hypothyroidism according to radiation dose in 5-year survivors of childhood cancer; graph shows the proportion not affected in years since diagnosis for no RT, less than 3500 cGy, 3500-4499 cGy,  and ≥4500 cGy.
Figure 4. Probability of developing hypothyroidism according to radiation dose in 5-year survivors of childhood cancer. Data from the Childhood Cancer Survivor Study.[8] Sklar C, Whitton J, Mertens A, Stovall M, Green D, Marina N, Greffe B, Wolden S, Robison L: Abnormalities of the Thyroid in Survivors of Hodgkin's Disease: Data from the Childhood Cancer Survivor Study. The Journal of Clinical Endocrinology and Metabolism 85 (9): 3227-3232, September 1, 2000. Copyright 2000, The Endocrine Society.