Fig. 1From: Validation and reproducibility of a new iodine specific food frequency questionnaire for assessing iodine intake in Norwegian pregnant womenBland-Altman plot of agreement between the iodine intake estimated from the iodine-specific food frequency questionnaire (I-FFQ) and the food diary (FD) (including diet and supplements) (n = 123). The solid line represents the mean difference between the two methods (33 μg/day), and the dotted lines represents the limits of agreements (LOA) corresponding to ±1.96 SD (lower agreement: − 150 μg/day, upper agreement: 216 μg/day)Back to article page