Table 2.

Iodine levels and serum thyroid hormone levels of the participants

Characteristics	Median	25p–75p	%95 CI
Mothers
Urinary iodine concentration (μg/L)	125.0	118.0–141.0	126.9–129.6
Breast milk iodine concentration (μg/L)	138	132.0–143.0	136.6–138.3
Newborns
Free T4 (ng/dL)	1.67	1.49–1.91	1.66–1.72
Total T4 (μg/dl)	13.7	11.4–16.2	13.7–14.4
Total T3 (ng/dl)	178.5	148.0–223.3	183.6–196.9
TSH (mIU/L)	4.6	2.8–8.5	6.3–7.9
Urinary iodine concentration (μg/L)	142.0	132.0–151.0	14.05–143.5

CI: confidence interval