Journal of International Obstetrics and Gynecology ›› 2024, Vol. 51 ›› Issue (5): 541-545.doi: 10.12280/gjfckx.20240421

• Obstetric Physiology & Obstetric Disease: Original Article • Previous Articles     Next Articles

Study on the Interaction and Predictive Value of Early Pregnancy BMI and 25-(OH)D3 in Gestational Diabetes Mellitus

LIU Zhao, ZHAO Lin-lin, LI Xia, WANG Xi-xian()   

  1. Department of Obstetrics and Gynecology, Beijing Aerospace General Hospital, Beijing 100076, China
  • Received:2024-05-09 Published:2024-10-15 Online:2024-10-17
  • Contact: WANG Xi-xian, E-mail: xxwang711@163.com

Abstract:

Objective: To investigate the interaction and predictive value of body mass index (BMI) and 25-hydroxyvitamin D3 [25-(OH)D3] in gestational diabetes mellitus (GDM). Methods: A retrospective analysis was conducted on the clinical data of 102 pregnant women with GDM (GDM group) admitted to Beijing Aerospace General Hospital from January 2020 to January 2023. Another 102 healthy pregnant women during the same period were selected as the control group. The BMI and 25-(OH)D3 levels in early pregnancy (8-12 weeks gestation), as well as fasting blood glucose (FBG), 1-hour postprandial blood glucose (1 h PBG), 2-hour postprandial blood glucose (2 h PBG) levels during the oral glucose tolerance test (OGTT), were compared between the two groups. The predictive value of BMI and 25-(OH)D3 in GDM was evaluated, the interaction between BMI and 25-(OH)D3 in GDM was analyzed. Results: The GDM group had higher FBG, 1 h PBG, 2 h PBG, and early pregnancy BMI levels than the control group, while the early pregnancy 25-(OH)D3 levels in the GDM group were lower than those in the control group (all P<0.05). Early pregnancy BMI was positively correlated with FBG, 1 h PBG, and 2 h PBG levels during OGTT, whereas 25-(OH)D3 was negatively correlated with FBG, 1 h PBG, and 2 h PBG levels during OGTT (all P<0.001). High BMI in early pregnancy was an independent risk factor for GDM (OR=1.285, 95%CI: 1.161-1.422, P<0.001), while high 25-(OH)D3 was an independent protective factor against GDM (OR=0.924, 95%CI: 0.899-0.948, P<0.001). After adjusting for confounding factors, a positive interaction between early pregnancy BMI and 25-(OH)D3 was observed in the risk of GDM, with a synergistic effect that was 2.096 times the sum of their individual effects (SI=2.096). Receiver operating characteristic (ROC) curve analysis showed that the combined prediction of GDM using early pregnancy BMI and 25-(OH)D3 have an area under the curve (AUC) of 0.832, with a sensitivity of 76.47% and a specificity of 75.49%. Conclusions: The simultaneous presence of high BMI and low 25-(OH)D3 levels in early pregnancy increases the risk of GDM, which can serve as a predictive indicators to provide guidance for the preventing GDM.

Key words: Diabetes, gestational, Body mass index, Calcifediol, Pregnancy trimester, first, Forecasting, Interactive relationships