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Associations Between Maternal Thyroid Function and Birth Outcomes in Chinese Mother-Child Dyads: A Retrospective Cohort Study.


ABSTRACT:

Objective

Although research suggests a close association between maternal thyroid function and birth outcomes, no clear conclusion has been reached. We aimed to explore this potential association in a retrospective cohort study.

Methods

This study included 8985 mother-child dyads. The maternal serum free tetraiodothyronine (FT4), thyroid-stimulating hormone (TSH), and thyroid peroxidase antibody (TPO Ab) concentrations and birth outcome data were reviewed from medical records. Subjects with TPO Ab concentrations of >34 and ?34 IU/ml were classified into the TPO Ab positivity (+) and TPO Ab negativity (-) groups, respectively.

Results

Compared with subjects in the normal group (0.1 ? TSH < 2.5 mIU/L and TPO Ab-), those with TSH concentrations of 2.5-4.0 mIU/L and TPO Ab- had a 0.65-fold lower risk of low birth weight (LBW). In contrast, those with TSH concentrations of >4.0 mIU/L, regardless of the TPO Ab status, had a 2.01-fold increased risk of LBW. Subclinical hypothyroidism, regardless of the TPO Ab status, was associated with a 1.94-fold higher risk of LBW when compared with that in subjects with euthyroidism and TPO Ab-. No other significant associations were observed.

Conclusion

A maternal TSH concentration of 2.5-4.0 mIU/L was associated with a lower risk of LBW when combined with TPO Ab-, whereas subjects with a TSH concentration of >4.0 mIU/L had an increased risk of LBW. Subclinical hypothyroidism appears to be associated with a higher risk of LBW.

SUBMITTER: Chen GD 

PROVIDER: S-EPMC7892893 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Publications

Associations Between Maternal Thyroid Function and Birth Outcomes in Chinese Mother-Child Dyads: A Retrospective Cohort Study.

Chen Geng-Dong GD   Pang Ting-Ting TT   Lu Xia-Fen XF   Li Peng-Sheng PS   Zhou Zi-Xing ZX   Ye Shao-Xin SX   Yang Jie J   Shen Xiu-Yin XY   Lin Dong-Xin DX   Fan Da-Zhi DZ   Lu De-Mei DM   Liu Zheng-Ping ZP  

Frontiers in endocrinology 20210205


<h4>Objective</h4>Although research suggests a close association between maternal thyroid function and birth outcomes, no clear conclusion has been reached. We aimed to explore this potential association in a retrospective cohort study.<h4>Methods</h4>This study included 8985 mother-child dyads. The maternal serum free tetraiodothyronine (FT4), thyroid-stimulating hormone (TSH), and thyroid peroxidase antibody (TPO Ab) concentrations and birth outcome data were reviewed from medical records. Sub  ...[more]

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