TABLE 2.

Cerebral Tissue Volumes (Mean ± SD as absolute volume [mL] and relative to ICV) for All Premature (n = 119) and Term-Born (n = 21) Infants

Tissue ClassPremature Infants (n = 119)Term-Born Infants (n = 21)P Value (t Test)
Cortical GM
    Absolute volume, mL178 ± 41227 ± 26.001
    % ICV39.4 ± 7.648.2 ± 9.5.01
Deep nuclear GM
    Absolute volume, mL10.8 ± 4.213.8 ± 5.2.02
    % ICV2.4 ± 1.02.9 ± 0.9.09
Myelinated WM
    Absolute volume, mL13.5 ± 5.820.8 ± 12.02
    % ICV3.4 ± 1.14.2 ± 2.2.05
Unmyelinated WM
    Absolute volume, mL202 ± 41206.5 ± 78.9
    % ICV42.6 ± 5.941.4 ± 9.9.9
Cerebral tissue, total
    Absolute volume, mL406 ± 57457 ± 67.003
    % ICV89.9 ± 4.494.1 ± 3.1.001
Cerebrospinal fluid
    Absolute volume, mL45.6 ± 22.128.9 ± 16.8.01
    % ICV10.1 ± 3.85.2 ± 3.0.001