Table 2.
Global MRI metrics in VLBW and full term controls.
| Imaging metrics | VLBW Mean (SD) | Control Mean (SD) | t | p |
|---|---|---|---|---|
| Grey matter (cm3) | 669 (61) | 723 (62) | −2.21 | 0.03 |
| Grey matter proportion | 0.445 (0.019) | 0.449 (0.016) | −2.32 | 0.022 |
| White matter (cm3) | 513 (61) | 558 (66) | −0.93 | 0.435 |
| Cerebrospinal fluid (cm3) | 322 (44) | 332 (50) | 2.48 | 0.014 |
| Intracranial volume (cm3) | 1504 (140) | 1613 (162) | −5.21 | <0.0001 |
| Mean GM perfusion(ml/100 g/min) | 50.6 (8.8) | 51.6 (7.6) | −0.99 | 0.33 |
| Partial volume corrected mean grey matter perfusion (ml/100 g/min) | 41.0 (7.23) | 41.5 (6.3) | −0.79 | 0.43 |
| FA | 0.448 (0.02) | 0.454 (0.01) | −1.57 | 0.12 |
| MDa | 0.727 (0.03) | 0.725 (0.02) | 0.97 | 0.33 |
| ADa | 1.11 (0.03) | 1.11 (0.02) | 0.12 | 0.91 |
| RDa | 0.533 (0.03) | 0.528 (0.02) | 1.3 | 0.2 |
| WMH volume (cm3) | 0.063 (0.20) | 0.049 (0.10) | 0.17 | 0.987 |
a
Mean and standard deviation for these DTI metrics have been multiplied by 103. WMH volume data was log transformed during the WMH analysis.