Table 3.

Measures of cortical thickness in 45 males and 31 females.

	Males (n=45)		Females (n=31)		d	Sex		Sex×side
	Mean	SD	Mean	SD		F(1,72)	p	F(1,72)	p
Total cortical thickness	4.24	0.48	4.19	0.29	0.12	0.23	0.63	5.02	0.03
Gyral cortical thickness	4.60	0.58	4.56	0.37	0.10	0.58	0.45	3.30	0.07
Sulcal cortical thickness	3.77	0.41	3.73	0.27	0.13	0.24	0.63	2.55	0.12
Frontal lobe
Total cortical thickness	4.50	0.50	4.44	0.38	0.14	0.42	0.52	2.25	0.14
Gyral cortical thickness	4.92	0.60	4.89	0.48	0.05	0.58	0.45	1.65	0.20
Sulcal cortical thickness	3.89	0.46	3.76	0.34	0.32	0.03	0.87	0.53	0.47
Parietal lobe
Total cortical thickness	3.93	0.45	3.88	0.29	0.13	0.36	0.55	0.16	0.69
Gyral cortical thickness	4.22	0.58	4.15	0.38	0.14	0.98	0.33	0.03	0.87
Sulcal cortical thickness	3.59	0.43	3.58	0.31	0.03	0.43	0.51	0.08	0.78
Temporal lobe
Total cortical thickness	4.56	0.61	4.50	0.31	0.12	0.09	0.77	2.64	0.11
Gyral cortical thickness	5.17	0.78	5.08	0.41	0.15	0.33	0.57	1.45	0.23
Sulcal cortical thickness	3.81	0.42	3.83	0.27	−0.07	1.21	0.28	2.63	0.11
Occipital lobe
Total cortical thickness	3.29	0.43	3.31	0.29	−0.05	0.42	0.52	4.22	0.04
Gyral cortical thickness	3.08	0.50	3.07	0.35	0.02	0.00	0.96	0.92	0.34
Sulcal cortical thickness	3.59	0.49	3.60	0.29	−0.02	0.51	0.48	4.29	0.04

Covariates: age, intracraneal volume.

Cortical thickness is measured in mm.

Significance threshold=0.05.

The total left cortical thickness was significantly thicker than the right side (p=0.006) for males. In the female group the right occipital thickness was greater than the left side (p=0.02).