Table 4.
Metabolite peak area ratios at term–equivalent age (TEA).
| Gray matter | White matter | |||||||
|---|---|---|---|---|---|---|---|---|
| NAA/Cho | NAA/Cr | Cho/Cr | Lac/Cr | NAA/Cho | NAA/Cr | Cho/Cr | Lac/Cr | |
| N | 59 | 59 | 59 | 59 | 63 | 63 | 63 | 63 |
| Data missing | 10 | 10 | 10 | 10 | 6 | 6 | 6 | 6 |
| Mean | 0.74 | 1.28 | 1.78 | 0.11 | 0.69 | 1.60 | 2.31 | 0.19 |
| Median | 0.74 | 1.24 | 1.66 | 0.00 | 0.67 | 1.38 | 2.02 | 0.00 |
| SD | 0.15 | 0.30 | 0.49 | 0.18 | 0.13 | 0.71 | 0.93 | 0.28 |
| Min | 0.324 | 0.56 | 0.97 | 0.00 | 0.34 | 0.586 | 1.01 | 0.00 |
| Maxi | 1.490 | 2.16 | 3.44 | 0.76 | 1.02 | 3.65 | 5.16 | 1.39 |
| Cent 25 | 0.68 | 1.04 | 1.45 | 0.00 | 0.62 | 1.17 | 1.67 | 0.00 |
| Cent 75 | 0.79 | 1.41 | 1.97 | 0.20 | 0.75 | 1.79 | 2.47 | 0.34 |
SD, standard deviation; NAA, N Acetyl Aspartate, Cr, Creatine, Cho, choline, Lac, lactate.
Data are shown as medians and interquartile range.
TEA, Period between 37 Weeks GA and 41 Weeks GA.
Locations of the measurement's voxels were periventricular posterior area at the level of the white matter (WM) and the thalamus and basal ganglia, volume of interest (VOI). Long echo times were always in the right panel.