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. 2013 Jan 17;2:197–203. doi: 10.1016/j.nicl.2013.01.003

Table 2.

Brain volumes.

	49,XXXXY		46,XY
	Mean (SD)	N	Mean (SD)	N	t	P	d
Total brain volume, ml	1117.4 (98.6)	14	1402.0 (112.4)	42	9.0	< .001^a	2.5
Corpus callosum region I, area	452.7 (50.8)	12	517.8 (81.7)	42	3.4	.002^a	0.8
Corpus callosum region II, area	382.1 (55.0)	12	444.6 (74.5)	42	3.2	.004^a	0.8
Corpus callosum region III, area	133.1 (25.5)	12	178.9 (36.1)	42	5.0	< .001^a	1.3
Corpus callosum region IV, area	65.0 (21.2)	12	91.8 (24.6)	42	3.7	.001^a	1.1
Corpus callosum region V, area	494.0 (72.7)	12	573.8 (94.5)	42	3.1	.005^a	0.8

All t-tests survived Bonferroni adjustment. Large effect sizes (> 0.8) were found for all comparisons using Cohen's d.

^a

Statistically significant.