Assessment of Iodine Status among Pregnant Women and Neonates Using Neonatal Thyrotropin (TSH) in Mainland China after the Introduction of New Revised Universal Salt Iodisation (USI) in 2012: A Re-Emergence of Iodine Deficiency?

Table 2

Biochemical results of participants by maternal BMI.

	Maternal BMI			value
	Normal (n = 475)	Overweight (n = 1471)	Obese (n = 1114)
Age (years)	27.0 ± 3.3	28.2 ± 4.0	28.8 ± 4.3	<0.001
Weight (kg)	59.3 ± 4.2	68.2 ± 4.7	79.9 ± 7.7	<0.001
BMI	22.6 ± 1.1	26.0 ± 1.1	30.9 ± 3.9	<0.001
Average length of pregnancy (gestational age at birth)	38.9 ± 1.7	39.2 ± 1.5	39.1 ± 1.4	<0.001
TSH (mIU/L)	1.81 ± 1.48	1.89 ± 2.55	1.91 ± 2.71	0.771
FT3 (pmol/L)	4.25 ± 0.93	4.48 ± 1.41	4.60 ± 1.80	<0.001
FT4 (pmol/L)	16.17 ± 3.24	16.08 ± 4.14	15.58 ± 6.00	0.013
Neonatal TSH (mIU/L)	4.84 ± 1.81	4.85 ± 2.27	4.89 ± 1.84	0.840
Prevalence of neonatal TSH values >5 mIU/L (%)	27.6	29.0	30.5	0.466
Neonatal birth weight (g)	3150 ± 412	3342 ± 430	3469 ± 470	<0.001
Prevalence of LBW (%)	5.7	2.9	2.4	0.002
10-min APGAR score	9.98 ± 0.24	9.99 ± 0.17	9.99 ± 0.23	0.927