Table 6.

Linear mixed effects model analysis of RD adjusted for total brain white matter RD, handedness, and head circumference. Units for the estimated effect size and standard error are 10⁻³ mm²/s (LH, left hemisphere).

Covariate	Estimated effect	SE	t-value	p-value
Autism	−0.008	0.006	−1.43	n.s.
LH	−0.027	0.005	−5.64	<10−4
Autism×LH	0.022	0.007	3.31	0.016
Age (years)	−0.004	0.002	−2.78	0.054