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Table 2 Maternal metals status during early pregnancy [Median (IQR)]

From: A prospective study of early pregnancy metal concentrations and gestational diabetes mellitus based on a birth cohort in Northwest China

Metals

Total (n = 5478)

Non-GDM (n = 4216)

GDM (n = 1262)

Z

P value a

Cu (µmol/L)

16.77 (13.37–20.36)

16.62 (13.31–20.29)

17.12 (13.62–20.86)

2.563

0.013

Zn (µmol/L)

84.52 (76.42–92.88)

84.27 (76.31–92.62)

85.02 (76.84–93.65)

2.508

0.015

Ca (mmol/L)

1.58 (1.48–1.72)

1.58 (1.48–1.72)

1.57 (1.46–1.71)

2.623

0.004

Mg (mmol/L)

1.38 (1.32–1.49)

1.38 (1.32–1.49)

1.39 (1.32–1.49)

1.662

0.162

Fe (mmol/L)

7.68 (7.21–8.21)

7.67 (7.20–8.19)

7.72 (7.27–8.31)

2.381

0.010

  1. aP values were derived from Mann-Whitney U test