Table 3.

Breast Milk Iodine Concentration and Infant Thyroglobulin Concentration According to Maternal Supplement Group

	N	8 Weeks postpartum	N	12 Weeks postpartum	N	24 Weeks postpartum	p*
Breast milk
BMIC (μg/L)
MMN	160	57 (41–83)	175	51 (35–72)	175	51 (32–74)
FeFol	154	51 (35–74)	153	44 (33–73)	157	39 (30–57)	0.3
Infants
Tg (μg/L)
MMN		—	163	87 (59–127)	152	67 (42–95)
FeFol			165	87 (58–124)	159	70 (47–91)	0.9

Data are median (IQR) derived from raw data. Data were log-transformed before analysis. Data were analyzed using linear mixed effects models.

^*The p-value tests time by supplement interaction.

BMIC, breast milk iodine concentration.