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Table 1 Maternal and neonatal characteristics with accurate EFW (≤ ± 10%) vs. EFW outlying ± 10%

From: Percent error of ultrasound examination to estimate fetal weight at term in different categories of birth weight with focus on maternal diabetes and obesity

 

EFW ≤  ± 10%

N = 7912

EFW outlying 10%

N = 3137

p-Value

Maternal characteristics

  Age (Years)

30.8 ± 5.5

30.9 ± 5.6

0.226 b

  Parity

1.76 ± 1.1

1.82 ± 1.1

0.737 b

  DM

12.3% (973)

13.2% (413)

0.208 a

    • GDM (diet./med.)

11.3% (896)

11.6% (1260)

0.678 a

    • Pre-existing DM

1.0% (77)

1.6% (49)

0.009 a

  Mean pre-pregnancy BMI (kg/m2)

24.3 ± 5.0

24.5 ± 5.1

0.136 b

  Pre-pregnancy BMI ≥ 30 kg/m2

12.4% (966)

13.7% (421)

0.188 a

  Weight Gain (kg)

14.3 ± 6.0

14.2 ± 6.2

0.55 b

  EWG (IOM)

49.1% (3520)

49.7% (1425)

0.602 b

  Days of last US to delivery

3.7 ± 3.7

4.7 ± 4.3

 < 0.001 b

  Days of last US to delivery > 7–14

18.2% (1439)

27.7% (870)

 < 0.001 a

Fetal anthropometrics

  SGA (≤ 10.Perc.)

11.11% (879)

13.42% (421)

0.001 a

  LGA (≥ 90. Perc.)

7.18% (568)

17.25% (541)

 < 0.001 a

  BW ≥ 4000 g

9.4% (743)

19.3% (607)

 < 0.001 a

  AC Percentile

46.1 ± 24.3

41.7 ± 25.1

0.025 b

  AC-HC (cm)

0.69 ± 1.83

0.40 ± 2.0

 < 0.001 b

  HC/AC-Ratio

0.98 ± 0.05

0.99 ± 0.06

 < 0.001 b

Neonatal anthropometrics

  Birth Weight (g)

3416.5 ± 451.6

3522.2 ± 554.9

 < 0.001 b

  Birth Weight Percentile

46.57 ± 27.69

53.62 ± 32.01

 < 0.001 b

  Shoulder dystocia

(Vaginal delivery mode; N = 8,161)

0.7% (44)

1.3% (28)

0.026 a

  1. aChi-square test, b Student T-test