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Table 1 Clinical characteristics in pregnant women between GDM and Non-GDM

From: Association between the cut-off value of the first trimester fasting plasma glucose level and gestational diabetes mellitus: a retrospective study from southern China

Features Overall(N = 28,030) Non-GDM(N = 23,361) GDM(N = 4669) P
Maternal age, years, mean ± SD 31.01 ± 4.12 30.71 ± 4.03 32.51 ± 4.25  < 0.001
  < 30, years, n (%) 11,235 (40.08) 10,016 (42.87) 1219 (26.11)  < 0.001
 30–34, years, n (%) 11,155 (39.80) 9188 (39.33) 1967 (42.13)
 35–39, years, n (%) 4752 (16.95) 3567 (15.27) 1185 (25.38)
  ≥ 40, years, n (%) 888 (3.17) 590 (2.53) 298 (6.38)
Pregestational BMI, kg/m2, mean ± SD 20.73 ± 2.41 20.62 ± 2.37 21.31 ± 2.52  < 0.001
  < 24 kg/m2, n (%) 25,485 (90.92) 21,437 (91.76) 4048 (86.70)  < 0.001
  ≥ 24 kg/m2, n (%) 2545 (9.08) 1924 (8.24) 621 (13.30)
First trimester FPG, mmol/L, mean ± SD 4.62 ± 0.37 4.59 ± 0.36 4.75 ± 0.43  < 0.001
  < 4.2 mmol/L,n(%) 2812 (10.03) 2510 (10.74) 302 (6.47)  < 0.001
  4.2–4.4 mmol/L, n (%) 6306 (22.50) 5468 (23.41) 838 (17.95)
  4.5–4.7 mmol/L, n (%) 8802 (31.40) 7603 (32.55) 1199 (25.68)
  4.8–4.9 mmol/L, n (%) 6110 (21.80) 4998 (21.39) 1112 (23.82)
  5.0–5.2 mmol/L, n (%) 2773 (9.89) 2054 (8.79) 719 (15.40)
  5.3–5.5 mmol/L, n (%) 859 (3.06) 540 (2.31) 319 (6.83)
  ≥ 5.6 mmol/L,n(%) 368 (1.31) 188 (0.80) 180 (3.86)
OGTT at 24 ~ 28 gestational weeks
  0 h OGTT, mmol/L, mean ± SD 4.35 ± 0.39 4.29 ± 0.32 4.64 ± 0.54  < 0.001
 1 h OGTT, mmol/L, mean ± SD 7.446 ± 1.59 7.11 ± 1.31 9.20 ± 1.73  < 0.001
  2 h OGTT, mmol/L, mean ± SD 6.62 ± 1.30 6.32 ± 1.00 8.12 ± 1.55  < 0.001
  1. *The category of the first-trimester FPG was according to the HAPO study