Table 1.

Characteristics, thyroid-related indicators and UIC of pregnant women (n=562).

Variable	Values
Age, years	28.71 ± 4.52
Gestational age, weeks	17.01 ± 1.65
Parity times	2 (1–3)
Delivery times	0 (0–1)
BMI, kg/m2	22.27 ± 4.60
TSH, mU/L	1.44 (1.00,2.04)
FT4, pmol/L	14.58 (12.96,16.30)
FT3, pmol/L	4.46 (4.19,4.71)
TT4, pmol/L	119.80 (96.15,141.18)
TT3, pmol/L	2.01 (1.49,2.36)
TPOAB (+), n (%)	42 (7.53%)
TGAB (+), n (%)	51 (10.45%)
TPOAB/TGAB (+), n (%)	77 (15.65%)
UIC, μg/L	158.25 (90.15, 245.65)

Values are expressed as mean± standard deviation (SD) or median (IQR).

BMI, body mass index; UIC, urinary iodine concentration; FT3, free triiodothyronine; FT4, free thyroid hormone; TSH, thyroid-stimulating hormone; TT3, total triiodothyronine; TT4, total thyroxine; TPOAB, thyroid peroxidase antibody; TGAB, thyroglobulin antibody; TPOAB (+), TPOAB-positive; TGAB (+), TGAB-positive.