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Table 2 Fetuses with abnormal z scores using Intergrowth 21st or Salomon equations

From: Fetal biometry assessment with Intergrowth 21st’s and Salomon’s equations in rural Burkina Faso

Anthropometrics Abnormal z score n (%)
<  2.5th centile < 10th centile > 90th centile >  97.5th centile
Biparietal diameter
 Intergrowth 21 10 (3.6) 39 (14.1) 1 (0.4) 1 (0.4)
 Salomon 3 (1.1) 14 (5.1) 1 (0.4) 1 (0.4)
 Mc Nemar test n.a <  0.001 n.a n.a
Abdominal circumference
 Intergrowth 21 1 (0.4) 3 (1.1) 86 (31.2) 33 (12.0)
 Salomon 0 (0.0) 1 (0.4) 8 (2.9) 2 (0.7)
 Mc Nemar test n.a n.a <  0.001 <  0.001
Head circumference
 Intergrowth 21 0 (0.0) 1 (0.4) 68 (24.6) 19 (6.9)
 Salomon 0 (0.0) 0 (0.0) 52 (18.8) 4 (1.4)
 Mc Nemar test n.a n.a <  0.001 <  0.001
Femur length
 Intergrowth 21 2 (0.7) 6 (2.2) 137 (49.6) 49 (17.8)
 Salomon 3 (1.1) 10 (3.6) 18 (6.5) 3 (1.1)
 Mc Nemar test n.a n.a <  0.001 <  0.001
  1. n.a not applicable; Intergrowth 21: international fetal and newborn growth consortium for the twenty-first century