Fig. 3

Change in thyroid cancer death rates versus change in median urinary iodine concentration. Correlation plot of change in age-adjusted (world population) death rates from thyroid cancer (TC) at all ages in a women and b men between 2000 and 2010 versus national or large subnational population median urinary iodine concentration (UIC) (μg/L) for the same time periods. Each data point represents one country. National thyroid cancer death rates are from La Vecchia et al. [1] and UIC data are from the Iodine Global Network [18] and WHO VMNIS [107]. Coefficient of determination r² and p-value are derived from the linear regression model.