Table 3. Associations of maternal hair cortisol concentration (HCC) with amygdala microstructural parameters assessed separately in boys and girls.

		Boys				Girls
		Model 1	Model 2			Model 1	Model 2
Side tested	Image metric	R2	R2	HCC β	HCC p-value	R2	R2	HCC β	HCC p-value
Left	FA	0.433	0.537	−0.339	0.023	0.157	0.239	0.340	0.372
	MD	0.489	0.497	0.090	0.462	0.445	0.449	−0.072	0.667
	ODI	0.124	0.215	0.317	0.085	0.132	0.159	−0.194	0.648
	NDI	0.622	0.654	−0.189	0.089	0.522	0.530	0.109	0.648
Right	FA	0.368	0.443	−0.287	0.047	0.301	0.306	0.091	0.736
	MD	0.508	0.571	0.264	0.047	0.497	0.506	0.111	0.736
	ODI	0.149	0.236	0.309	0.047	0.362	0.378	−0.149	0.736
	NDI	0.581	0.623	−0.215	0.047	0.571	0.573	0.050	0.736

Model 1: Gestational age at MRI, gestational age at birth, birth weight z-score, Scottish Index of Multiple Deprivation 2016 quintile. Model 2: Model 1 + (maternal HCC). p-values are FDR adjusted. FA, fractional anisotropy; MD, mean diffusivity; ODI, orientation dispersion index; NDI, neurite density index; HCC, hair cortisol concentration; R², coefficient of determination; β, standardised beta coefficient; p-value, FDR adjusted probability value.