Table 2.

Urinary iodine and creatinine concentration in the participants

	All (N = 220)	Boys (N = 106)	Girls (N = 114)	p value
UIC (µg/L)	132 (96)	136 (97)	131 (97)	0.321
Creatinine concentration (g/L)	0.8 (0.4)	0.8 (0.5)	0.8 (0.4)	0.119
Iodine/creatinine ratio (µg/g)	163 (138)	163 (143)	163 (138)	0.676
Estimated 24 h UIE (µg/day)	65 (55)	65 (57)	65 (55)	0.676

Data are given as median (IQR)

p value for comparison between boys and girls is given with independent samples Mann–Whitney U test

IQR interquartile range, SD standard deviation, UIC urinary iodine concentration, UIE urinary iodine excretion