From: Validation and reproducibility of a new iodine specific food frequency questionnaire for assessing iodine intake in Norwegian pregnant women
Iodine intake from
I-FFQb vs. Food diaryc (n = 123)
I-FFQb vs. UICd (n = 123)
Food diaryc vs. UICd (n = 134)
Diet
0.36 (P < 0.001)
0.06 (P = 0.488)
0.18 (P = 0.042)
Diet and supplements
0.62 (P < 0.001)
0.21 (P = 0.018)
0.41 (P < 0.001)