Table 5.

Multivariate analysis by linear regression, studying the effects of the study group (full term infants as reference group), gender (female as reference group) and gestational age at MRI (GA at MRI) on brain metrics (unstandardised regression coefficients and 95 % confidence intervals)

Brain measure	Preterm group	GA at MRI (per week)	Male	% variance explained
Bifrontal diameter	−7.7 [−9.2; −6.2]**	1.1 [0.6;1.5]**	2.4 [1.4;3.5]**	42.5%
Biparietal diameter	−9.3 [−11.0; −7.7]**	1.4 [0.9;1.9]**	1.6 [0.4;2.8]**	46.5 %
Transverse cerebellar diameter	−4.1 [−5.1; −3.1]**	1.3 [1.0;1.6]**	0.4 [−0.3;1.1]	44.2 %
Fronto-occipital diameter	0.2 [−0.4;0.4]	1.6 [0.05;0.3]*	0.16 [−0.1;0.4]	7.9 %
Corpus callosum length	0.01 [−0.22;0.23]	0.06 [−0.002;0.13]	0.05 [−0.12;0.21]	1.7 %

^*p<0.05

^**p<0.001