Table 2:

Sulcal depth and grading scores of the study groups^a

Variable	Controls (n = 29)	INSVM (n = 32)	P
Left hemisphere depths
Insula	29.4 ± 1.5	29.7 ± 1.8	.03b
Sylvian fissure	16.7 ± 1.6	17.2 ± 2.4	.15
Parieto-occipital sulcus	10.2 ± 2.3	8.1 ± 2.6	<.01b
Cingulate sulcus	3.8 ± 1.3	4.3 ± 2.5	.29
Calcarine sulcus	12.5 ± 2.7	10.9 ± 2.1	<.01b
Right hemisphere depths
Insula	29.6 ± 1.4	29.7 ± 1.7	.04b
Sylvian fissure	16.8 ± 1.9	16.0 ± 1.6	.01b
Parieto-occipital sulcus	11.1 ± 2.4	9.0 ± 2.8	<.01b
Cingulate sulcus	3.6 ± 1.1	4.0 ± 1.5	.33
Calcarine sulcus	13.5 ± 2.2	11.8 ± 4.8	<.02b
Sum of grading scores
Left hemisphere	21.1 ± 5.3	18.2 ± 5.1	.01b
Right hemisphere	21.8 ± 5.1	19.6 ± 5.3	.03b
Total cortex	42.9 ± 10.2	37.8 ± 9.9	.01b

^aComparison of sulcal depth measurements between the control and case cohort. Depth measurements (in millimeters) were normalized by BPD and multiplied by 100. Results are expressed as means. P values were adjusted by gestational age at examination and sex.

^bValues ≤ .05.