The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2025
Impact of high-normal TSH in early pregnancy on gestational diabetes mellitus: a retrospective cohort study.
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Yang Li, Tian Xiangming, Lu Yongjun, Meng Wenying
Аннотация
OBJECTIVE: This study aimed to investigate whether high-normal TSH contributes to the risk of developing GDM.
METHODS: A retrospective cohort study was undertaken to investigate the impact of female high-normal TSH on GDM in a sample of 1906 patients who were delivered in our center between January 2022 and December 2022. The patients were categorized into two groups based on their median TSH (1.04 mIU/L) in early pregnancy: a low-normal group (0.10 ≤ TSH ≤ 1.04 mIU/L, N = 954) and a high-normal group (1.04 < TSH < 4.00 mIU/L, N = 952).
RESULTS: The TSH level in the first trimester was positively associated with the glucose (GLU) 0 min (r = 0.089, p < 0.001) level before glucose loading, GLU60min (r = 0.053, p = 0.024) and GLU120min (r = 0.056, p < 0.017) level after glucose loading. High-normal TSH was a positively associated predictor (adjusted OR: 1.3, 95% CI:1.0-1.6) of GDM in singleton pregnancies. Further analysis indicated a nonlinear relationship between TSH and GDM (p < 0.05): when TSH ≤ 1.3 mIU/L, TSH was positively correlated with the incidence of GDM, but when TSH > 1.3 mIU/L, the incidence of GDM was relatively flat with increasing TSH. No statistical differences was observed in the female age (31.2 ± 4.1 Vs 31.4 ± 4.1, p = 0.433).
CONCLUSION: High-normal TSH might be associated with an increased risk of GDM.
METHODS: A retrospective cohort study was undertaken to investigate the impact of female high-normal TSH on GDM in a sample of 1906 patients who were delivered in our center between January 2022 and December 2022. The patients were categorized into two groups based on their median TSH (1.04 mIU/L) in early pregnancy: a low-normal group (0.10 ≤ TSH ≤ 1.04 mIU/L, N = 954) and a high-normal group (1.04 < TSH < 4.00 mIU/L, N = 952).
RESULTS: The TSH level in the first trimester was positively associated with the glucose (GLU) 0 min (r = 0.089, p < 0.001) level before glucose loading, GLU60min (r = 0.053, p = 0.024) and GLU120min (r = 0.056, p < 0.017) level after glucose loading. High-normal TSH was a positively associated predictor (adjusted OR: 1.3, 95% CI:1.0-1.6) of GDM in singleton pregnancies. Further analysis indicated a nonlinear relationship between TSH and GDM (p < 0.05): when TSH ≤ 1.3 mIU/L, TSH was positively correlated with the incidence of GDM, but when TSH > 1.3 mIU/L, the incidence of GDM was relatively flat with increasing TSH. No statistical differences was observed in the female age (31.2 ± 4.1 Vs 31.4 ± 4.1, p = 0.433).
CONCLUSION: High-normal TSH might be associated with an increased risk of GDM.