Evaluation of median urinary iodine concentration cut-off for defining iodine deficiency in pregnant women after a long term USI in China

Table 2 Comparison of Thyroid function parameters in different gestation

Gestation	N	FT3 (pmol/L)	FT4 (pmol/L)	TSH (mIU/L)	SI (μg/L)	TG (μg/L)
6th	79	4.74 ± 0.52	16.01 ± 2.00	1.48 ± 0.65	–	–
12th	79	4.44 ± 0.56^a	15.38 ± 1.97^a	1.08 ± 0.70^a	80.11 ± 15.72	8.91(6.83~15.22)
24th	78	3.90 ± 0.36^ab	12.59 ± 1.51^ab	1.58 ± 0.63^b	68.99 ± 13.39^b	7.74(5.03~12.98)^b
32th	78	3.94 ± 0.78^ab	12.62 ± 1.84^ab	1.74 ± 0.73^abc	69.14 ± 15.75^b	9.92(6.19~16.33)^c
F		50.36	132.61	32.61	38.39	14.24
P value		< 0.0001	< 0.0001	< 0.0001	< 0.0001	< 0.0001

FT3 Free Triiodothyronine, FT4 Free Thyroxine, TSH Thyroid Stimulating Hormone, SI serum iodine, TG thyroid globulin. ^ap < 0.05 between each trimesters with the 6th weeks; ^bp < 0.05 between each trimesters with the 12th weeks; ^cp < 0.05 between each trimesters with the 24th weeks

ISSN: 1743-7075