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Table 2 Maternal hemoglobin levels in women with gestational diabetes mellitus, pre-eclampsia, preterm birth and controls in the first trimester

From: Hemoglobin levels during the first trimester of pregnancy are associated with the risk of gestational diabetes mellitus, pre-eclampsia and preterm birth in Chinese women: a retrospective study

  Total, n = 21,577   Pre-pregnancy BMI < 24 kg/m2, n = 17,794   Pre-pregnancy BMI ≥ 24 kg/m2, n = 3783
No Yes P No Yes P No Yes P
GDM 129.5 ± 9.8, n = 17,240 131.3 ± 9.8, n = 4337 < 0.001 129.0 ± 9.8, n = 14,703 130.5 ± 9.8, n = 3091 0.000 132.2 ± 9.4, n = 2537 133.2 ± 9.7, n = 1246 0.003
PE 129.8 ± 9.8, n = 21,293 132.2 ± 10.5, n = 284 < 0.001 129.3 ± 9.8, n = 17,615 130.6 ± 11.1, n = 179 0.062 132.5 ± 9.5, n = 3678 134.8 ± 8.8, n = 105 0.013
Preterm birth 129.9 ± 9.8, n = 20,550 128.9 ± 10.5, n = 1027 0.002 129.3 ± 9.8, n = 16,988 127.8 ± 10.4, n = 806 0.000 132.5 ± 9.4, n = 3562 133.0 ± 10.0, n = 221 0.501
  1. Data are represented as the mean ± SD
  2. Abbreviations: Hb hemoglobin, BMI mass index, GDM gestational diabetes mellitus, PE pre-eclampsia