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Chen GD, Pang TT, Lu XF, Li PS, Zhou ZX, Ye SX, Yang J, Shen XY, Lin DX, Fan DZ, Lu DM, Liu ZP. Associations Between Maternal Thyroid Function and Birth Outcomes in Chinese Mother-Child Dyads: A Retrospective Cohort Study. Front Endocrinol (Lausanne) 2020; 11:611071. [PMID: 33613448 PMCID: PMC7892893 DOI: 10.3389/fendo.2020.611071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/10/2020] [Indexed: 02/05/2023] Open
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.
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Affiliation(s)
- Geng-Dong Chen
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Ting-Ting Pang
- Department of Medical Records, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Xia-Fen Lu
- Department of Obstetrics, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Peng-Sheng Li
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Zi-Xing Zhou
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Shao-Xin Ye
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Jie Yang
- Department of Obstetrics, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Xiu-Yin Shen
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Dong-Xin Lin
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - Da-Zhi Fan
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
| | - De-Mei Lu
- Department of Obstetrics, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
- *Correspondence: De-Mei Lu, ; Zheng-Ping Liu,
| | - Zheng-Ping Liu
- Foshan Institute of Fetal Medicine, Affiliated Foshan Maternity and Child Healthcare Hospital, Southern Medical University, Foshan, China
- *Correspondence: De-Mei Lu, ; Zheng-Ping Liu,
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