Thyroid cancer risk by radiation dose in cases and controls after adjustment for first cancer. Linear dose-response model for relative risk calculated as 1 + 0.5117(dose). Linear exponential dose-response model for relative risk calculated as 1 + 1.316(dose) exp(-0.00189[dosexdose]). Vertical lines=95% CI for OR. Reprinted from The Lancet, Vol. 365, Sigurdson et al., Primary thyroid cancer after a first tumour in childhood (the Childhood Cancer Survivor Study): a nested case-control study, 2014-2023, 2005, with permission from Elsevier.