TABLE 3.

Absolute Cerebral Tissue Volumes for Premature Infants ≤26 Weeks (n = 37) in Comparison With Premature Infants ≥27 Weeks (n = 82)

Tissue ClassPremature Infants ≤26 wk (Range: 23–26 wk; n = 37)Premature Infants ≥27 wk (Range: 27–32 wk; n = 82)P Value (t Test)
Cortical GM, mL166 ± 42178 ± 41.9
Deep nuclear GM, mL7.4 ± 3.712.3 ± 4.2<.01
Cerebrospinal fluid, mL53.2 ± 26.138.8 ± 18.8.01
Total ICV, mL448 ± 61463 ± 59.7
Cerebral tissues, total, mL386 ± 60419 ± 57.06