Table 5.

Correlation analysis of each Gompertz growth model and SM content

Region	Parameter	Pearson’s r	p value
Frontal WM	α	0.08	0.580
	β	–0.51	<0.001***
	γ	–0.21	0.147
	δ	–0.22	0.128
Temporal WM	α	0.04	0.790
	β	–0.99	<0.001***
	γ	–0.83	<0.001***
	δ	0.29	0.040*
Parietal WM	α	0.37	0.008**
	β	–0.90	<0.001***
	γ	–0.99	<0.001***
	δ	–0.97	<0.001***
Occipital WM	α	0.13	0.170
	β	–0.99	<0.001***
	γ	–0.45	0.001***
	δ	0.36	0.012*
Cerebellar WM	α	0.99	<0.001***
	β	–0.68	<0.001***
	γ	–0.83	<0.001***
	δ	0.31	0.026*
Corpus callosum (body)	α	0.37	0.009**
	β	–0.94	<0.001***
	γ	–0.99	<0.001***
	δ	–0.99	<0.001***
Corpus callosum (genu)	α	0.17	0.240
	β	–0.73	<0.001***
	γ	–0.43	0.002**
	δ	–0.74	<0.001***
Corpus callosum (splenium)	α	0.52	0.001***
	β	–0.85	<0.001***
	γ	–0.99	<0.001***
	δ	–0.99	<0.001***

The four Gompertz curve parameters indicate the initial onset of growth (β), initial growth rate (γ), a second reflection where growth begins to slow considerably (α), and a final linear growth rate (δ); *p < 0.05, **p < 0.01, ***p < 0.001.