Relationship between the two methods for estimating iodine intake
SD
The median iodine intake estimated from the 24-h dietary recall (58 µg/day) was significantly lower than the levels determined from the UIE (113 µg/day, The agreement between different determination approaches was assessed through a Bland–Altman plot (Fig. Bland–Altman plot, mean iodine intake estimated from 24-h urine iodine excretion (UIE) and the 24-h dietary recall (24-h DR) versus the difference between the methods (24-h DR—UIE). The red line indicates the mean difference in iodine intake estimates, whereas the red dashed line represents the limits of agreement from − 1.96 SD to + 1.96 SD