Table 2.

Hierarchical regression for insula cortex thickness (age, sex).

	Variable	B	SE B	β	t
Dependent variable: left anterior insula
Step 1	Age	−.023	.005	−.486	−4.196	***
Step 2	Age	−.022	.005	−.468	−4.008	***
	Sex	−.035	.031	−.129	−1.110
Dependent variable: right anterior insula
Step 1	Age	−.029	.006	−.521	−4.604	***
Step 2	Age	−.029	.006	−.512	−4.457	***
	Sex	−.019	.037	−.060	−.526
Dependent variable: left posterior insula
Step 1	Age	−.002	.009	−.032	−.238
Step 2	Age	.000	.009	.001	.007
	Sex	−.089	.050	−.232	−1.771
Dependent variable: right posterior insula
Step 1	Age	−.005	.008	−.089	−.673
Step 2	Age	−.004	.008	−.067	−.507
	Sex	−.050	.044	−.153	−1.151

Left anterior insula, R² = .24 for Step 1; ΔR² = .02 for Step 2, n.s.; right anterior insula, R² = .26 for Step 1; ΔR² < .01 for Step 2, n.s.; left posterior insula, R² < .01 for Step 1; ΔR² = .05 for Step 2; right posterior insula, R² < .01 for Step 1; ΔR² = .02 for Step 2 n.s.

^***p < .001.