Table 1.
Descriptive statistics of the selected variables
| Categorical variables | Number | Percent |
|---|---|---|
| Gender | ||
| Male | 19 | 67.9% |
| Female | 9 | 32.1% |
| Tumour grade | ||
| III | 11 | 39.3% |
| IV | 17 | 60.7% |
| Cerebral hemisphere | ||
| Left | 13 | 52% |
| Right | 8 | 32% |
| Both | 4 | 16% |
| Tumour location | ||
| Zone I | 10 | 35.7% |
| Zone II | 3 | 10.7% |
| Zone III | 12 | 42.9% |
| Zone IV | 3 | 10.7% |
| Continuous variables | Mean | SD |
| Age (years) | 50.54 | 16.283 |
| ADC tumour (mm2 s−1) | 0.001310 | 0.000391 |
| ADC necrosis (mm2 s−1) | 0.002290 | 0.000927 |
| ADC proximal oedema (mm2 s−1) | 0.001294 | 0.000460 |
| ADC distal oedema (mm2 s−1) | 0.001323 | 0.000283 |
| ADC normal tissue (mm2 s−1) | 0.000885 | 0.000200 |
| Naa/Cr | 0.874 | 0.637 |
| Cho/Cr | 2.353 | 1.190 |
| Lipids–lactate/Cr | 3.806 | 3.204 |
| mI/Cr | 1.572 | 1.272 |
| Cho/Naa | 3.613 | 2.033 |
| Post-contrast T1 volume (cm3) | 24.047 | 29.551 |
| Pre-contrast T2 volume (cm3) | 74.948 | 46.699 |
| T1/T2 volume ratio | 0.337 | 0.316 |
| FLAIR volume (cm3) | 79.031 | 44.647 |
| T1/FLAIR volume ratio | 0.298 | 0.270 |
ADC, apparent diffusion coefficient; FLAIR, fluid-attenuated inversion recovery; mI, myo-Inositol; SD, standard deviation.