Table 6.

Abnormal z scores using Intergrowth 21st or Salomon equations in the third trimester

Anthropometrics	Abnormal z scores n (%)
	<  2.5th centile	< 10th centile	> 90th centile	>  97.5th centile
Biparietal diameter
Intergrowth 21	6 (7.0)	23 (26.7)	0(0)	0(0)
Salomon	2 (2.3)	10 (11.6)	0(0)	0(0)
Abdominal circumference
Intergrowth 21	0(0)	0 (0)	17 (19.8)	5 (5.8)
Salomon	0(0)	0 (0)	3 (3.5)	0(0)
Head circumference
Intergrowth 21	0(0)	0 (0)	19 (22.1)	4 (4.7)
Salomon	0(0)	0 (0)	18 (20.9)	1 (1.2)
Femur length
Intergrowth 21	2 (2.3)	4 (4.7)	34 (39.5)	17 (19.8)
Salomon	3 (3.5)	6 (7.0)	5 (5.8)	1 (1.2)