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Table 4 Abnormal z scores using Intergrowth 21st or Salomon equations in the second trimester

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

Anthropometrics Abnormal z scores n (%)
<  2.5th centile < 10th centile > 90th centile >  97.5th centile
Biparietal diameter
 Intergrowth 21 4 (2.1) 16 (8.4) 1 (0.5) 1 (0.5)
 Salomon 1 (0.5) 4 (2.1) 1 (0.5) 1 (0.5)
Abdominal circumference
  Intergrowth 21 1 (0.5) 3 (1.6) 69 (36.3) 28 (14.7)
 Salomon 0 (0) 1 (0.5) 5 (2.6) 2 (1.1)
Head circumference
 Intergrowth 21 0 (0) 1 (0.5) 49 (25.8) 15 (7.9)
 Salomon 0 (0) 0 (0) 34 (17.9) 3 (1.6)
Femur length
  Intergrowth 21 0 (0) 2 (1.1) 103 (54.2) 32 (16.8)
 Salomon 0 (0) 4 (2.1) 13 (6.8) 2 (1.1)