Frontal lobe development in fetuses with growth restriction by using ultrasound: a case–control study

Table 3 Logarithmic regression models for predicting the fetal frontal antero-posterior diameter and occipito-frontal diameter based on the gestational age and transverse cerebellar diameter in appropriately grown fetuses (the regression equations for mean are described as y = a + b Ln (x) and the regression equations for standard deviations are described as y’ = a’ + b’ Ln (x’))

Parameters	Formula for
	Estimated Mean						Estimated SDs
	a			b			a’			b’
	Value	SEs	P	Value	SEs	P	Value	SEs	P	Value	SEs	P
Gestational age (GA) (weeks)
FAPD	-59.133	1.366	< 0.001	27.689	0.404	< 0.001	-1.138	0.794	0.153	0.693	0.235	0.003
OFD	-159.380	3.085	< 0.001	72.136	0.913	< 0.001	-5.034	1.949	0.010	2.251	0.577	< 0.001
Transverse cerebellar diameter (TCD) (mm)
FAPD	-32.306	1.117	< 0.001	18.718	0.313	< 0.001	-1.073	0.665	0.108	0.678	0.186	< 0.001
OFD	-89.142	2.685	< 0.001	48.666	0.752	< 0.001	-2.235	1.605	0.165	1.532	0.450	0.001

BPD Biparietal diameter, FAPD Frontal antero-posterior diameter, OFD Occipito-frontal diameter, TCD Transverse cerebellar diameter, SEs Standard errors

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