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1. Prospective association of metal levels with gestational diabetes mellitus and glucose: A retrospective cohort study from South China

Author

Zixing Zhou, Gengdong Chen, Pengsheng Li, Jiaming Rao, Lijuan Wang, Dandan Yu, Dongxin Lin, Dazhi Fan, Shaoxin Ye, Shuzhen Wu, Xiaoyan Gou, Haiyan Wang, Xiaoling Guo, Lei Lin, Dongmei Suo, and Zhengping Liu

Subjects
Gestational diabetes mellitus, Metal, Glucose, Environmental pollution, TD172-193.5, Environmental sciences, GE1-350
Abstract

Objective: To explore the prospective correlation between serum metals before 24 weeks’ gestation and gestational diabetes mellitus (GDM) or glucose in the late second trimester among southern Chinese pregnant women. Methods: A total of 8169 pregnant women were included in our retrospective cohort study. Logistic regression was used to investigate the relationships between metals (Manganese [Mn], copper [Cu], lead [Pb], calcium [Ca], zinc [Zn], magnesium [Mg]) and GDM. Quantile regression was performed to detect the shifts and associations with metals and three time-points glucose distribution of oral glucose tolerance test (OGTT) focused on the 10th, 50th, and 90th percentiles. Weighted quantile sum (WQS) regression was used to explore the relationship of metal mixtures and GDM as well as glucose. Results: Maternal serum concentrations of metals were assessed at mean 16.55 ± 2.92 weeks’ gestation. Women with under weight might have 25% decreased risk of GDM for every 50% increase in Cu concentration within the safe limits. A 50% increase in Mn and Zn levels was related to a 0.051 μmol/L (95% CI: 0.033–0.070) and 0.059 μmol/L (95% CI: 0.040–0.079) increase in mean fasting plasma glucose of OGTT (OGTT0), respectively. The magnitude of association with Mn was smaller at the upper tail of OGTT0 distribution, while the magnitude of correlation with Zn was greater at the upper tail. However, there was a 0.012 mmol/L (95% CI: −0.017 to −0.008), 0.028 mmol/L (95% CI: −0.049 to −0.007), and 0.036 mmol/L (95% CI: −0.057 to −0.016) decrease in mean OGTT0 levels for every 50% increase in Pb, Ca, and Mg, respectively. The negative association of Pb, Ca, and Mg was greater at the lower tail of OGTT0 distribution. No significant relationship was observed in Cu and mean OGTT0 level (−0.010 mmol/L, 95% CI: −0.021 to 0.001), however, it showed a protective effect at the upper tail (−0.034 mmol/L, 95% CI: −0.049 to −0.017). No obvious correlation was found between metals and postprandial glucose levels (OGTT1 and OGTT2 from OGTT). The WQS index was significantly related to OGTT0 (P

Published
2021
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2. Prospective association of metal levels with gestational diabetes mellitus and glucose: A retrospective cohort study from South China

Author

Shuzhen Wu, Lei Lin, Zixing Zhou, Xiaoyan Gou, Haiyan Wang, Xiaoling Guo, Dandan Yu, Gengdong Chen, Pengsheng Li, Dongxin Lin, Jiaming Rao, Zhengping Liu, Lijuan Wang, Shaoxin Ye, Dongmei Suo, and Dazhi Fan

Subjects
Adult, Blood Glucose, medicine.medical_specialty, China, South china, Health, Toxicology and Mutagenesis, 0211 other engineering and technologies, 02 engineering and technology, 010501 environmental sciences, Logistic regression, 01 natural sciences, Gestational diabetes mellitus, Environmental pollution, Pregnancy, Internal medicine, medicine, Humans, GE1-350, 0105 earth and related environmental sciences, 021110 strategic, defence & security studies, business.industry, Metal, Public Health, Environmental and Occupational Health, Southern chinese, Retrospective cohort study, General Medicine, medicine.disease, Pollution, Gestational diabetes, Environmental sciences, Diabetes, Gestational, Endocrinology, Postprandial, Glucose, TD172-193.5, Metals, Gestation, Female, business, Biomarkers, Biological Monitoring
Abstract

Objective: To explore the prospective correlation between serum metals before 24 weeks’ gestation and gestational diabetes mellitus (GDM) or glucose in the late second trimester among southern Chinese pregnant women. Methods: A total of 8169 pregnant women were included in our retrospective cohort study. Logistic regression was used to investigate the relationships between metals (Manganese [Mn], copper [Cu], lead [Pb], calcium [Ca], zinc [Zn], magnesium [Mg]) and GDM. Quantile regression was performed to detect the shifts and associations with metals and three time-points glucose distribution of oral glucose tolerance test (OGTT) focused on the 10th, 50th, and 90th percentiles. Weighted quantile sum (WQS) regression was used to explore the relationship of metal mixtures and GDM as well as glucose. Results: Maternal serum concentrations of metals were assessed at mean 16.55 ± 2.92 weeks’ gestation. Women with under weight might have 25% decreased risk of GDM for every 50% increase in Cu concentration within the safe limits. A 50% increase in Mn and Zn levels was related to a 0.051 μmol/L (95% CI: 0.033–0.070) and 0.059 μmol/L (95% CI: 0.040–0.079) increase in mean fasting plasma glucose of OGTT (OGTT0), respectively. The magnitude of association with Mn was smaller at the upper tail of OGTT0 distribution, while the magnitude of correlation with Zn was greater at the upper tail. However, there was a 0.012 mmol/L (95% CI: −0.017 to −0.008), 0.028 mmol/L (95% CI: −0.049 to −0.007), and 0.036 mmol/L (95% CI: −0.057 to −0.016) decrease in mean OGTT0 levels for every 50% increase in Pb, Ca, and Mg, respectively. The negative association of Pb, Ca, and Mg was greater at the lower tail of OGTT0 distribution. No significant relationship was observed in Cu and mean OGTT0 level (−0.010 mmol/L, 95% CI: −0.021 to 0.001), however, it showed a protective effect at the upper tail (−0.034 mmol/L, 95% CI: −0.049 to −0.017). No obvious correlation was found between metals and postprandial glucose levels (OGTT1 and OGTT2 from OGTT). The WQS index was significantly related to OGTT0 (P

Published
2021

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