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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Neuroimage. 2012 Sep 16;64:10.1016/j.neuroimage.2012.09.021. doi: 10.1016/j.neuroimage.2012.09.021

Table 5.

Brain Volume Descriptive Statistics for Gender and Twin Status Comparisons

Gender Male
(n = 34)		 Female
(n = 30)		 p-value
Total Tissue Volume 876,834 ± 73,015 819,059 ± 81,067 0.004
Grey Matter 639,501 ± 50,847 604,593 ± 54,091 0.010
White Matter 237,333 ± 29,156 214,466 ± 28,142 0.002
Twin Status Singleton
(n = 25)		 Twin
(n = 39)		 p-value
Total Tissue Volume 842,941 ± 77,054 860,378 ± 88,850 0.409
Grey Matter 618,132 ± 51,438 630,947 ± 60,051 0.366
White Matter 224,809 ± 28,222 229,431 ± 34,618 0.561

Values are Mean ± SD (mm3). Structural volumetric data was not available for all infants with DTI.