Clinical and neuroradiological findings
| Case | Neurological outcome | US | Magnetic resonance imaging | |||||||||
| LV | WMS | WMR | GM | Cysts | SS | CC | Total score | VC | OR | |||
| 1 | Hemi | PVL-2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 | 1 | 1 |
| 2 | Norm | PVL-1 | 1 | 2 | 2 | 1 | 2 | 2 | 1 | 11 | 1 | 1 |
| 3 | Dip | PVL-1 | 1 | 2 | 2 | 1 | 1 | 1 | 3 | 11 | 1 | 1 |
| 4 | Reta | PVL-1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 8 | 1 | 1 |
| 5 | Dip | PVL-2 | 1 | 2 | 1 | 1 | 1 | 1 | 3 | 10 | 1 | 3 |
| 6 | Reta | PVL-1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 | 1 | 1 |
| 7 | Hemi | PVL-1/IPE | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 12 | 1 | 1 |
| 8 | Dip | PVL-3 | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 11 | 1 | 1 |
| 9 | Dip | PVL-1 | 1 | 2 | 2 | 1 | 1 | 1 | 2 | 10 | 1 | 2 |
| 10 | Reta | PVL-2 | 1 | 2 | 2 | 1 | 2 | 2 | 1 | 11 | 1 | 2 |
| 11 | Reta | PVL-1 | 3 | 2 | 2 | 1 | 1 | 1 | 3 | 13 | 1 | 1 |
| 12 | Dip | PVL-1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 8 | 1 | 1 |
| 13 | Dip | PVL-2 | 1 | 2 | 2 | 1 | 2 | 1 | 2 | 11 | 1 | 3 |
| 14 | Dip | PVL-3 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 9 | 1 | 1 |
| 15 | Dip | PVL-2 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 8 | 1 | 1 |
| 16 | Dip | PVL-1 | 2 | 2 | 2 | 1 | 2 | 1 | 1 | 11 | 1 | 2 |
| 17 | Dip | PVL-1 | 2 | 2 | 1 | 1 | 1 | 2 | 1 | 10 | 1 | 2 |
| 18 | Dip | NA | 3 | 2 | 2 | 1 | 2 | 2 | 2 | 14 | 1 | 2 |
| 19 | Reta | PVL-1 | 2 | 2 | 2 | 1 | 2 | 1 | 1 | 11 | 1 | 3 |
| 20 | Reta | PVL-2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 | 1 | 1 |
| 21 | Dip | PVL-2 | 2 | 3 | 3 | 1 | 1 | 2 | 2 | 14 | 1 | 2 |
| 22 | Tetra | PVL-3 | 3 | 2 | 2 | 1 | 1 | 2 | 2 | 13 | 1 | 3 |
| 23 | Dip | PVL-3 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 12 | 1 | 2 |
| 24 | Dip | PVL-1 | 3 | 3 | 3 | 1 | 2 | 2 | 3 | 17 | 1 | 1 |
| 25 | Dip | PVL-1/IPE | 3 | 2 | 2 | 2 | 2 | 2 | 3 | 16 | 2 | 3 |
| 26 | Tetra | PVL-3 | 3 | 2 | 2 | 1 | 3 | 1 | 3 | 15 | 1 | 3 |
| 27 | Tetra | PVL-3 | 3 | 2 | 3 | 1 | 2 | 1 | 3 | 15 | 1 | 3 |
| 28 | Tetra | PVL-2 | 3 | 2 | 3 | 1 | 1 | 2 | 3 | 15 | 1 | 3 |
| 29 | Tetra | PVL-3 | 2 | 2 | 2 | 1 | 2 | 1 | 2 | 12 | 1 | 3 |
Hemi, hemiplegia; Dip, diplegia; Tetra, tetraplegia; Reta, retardation; Norm, normal; PVL, periventricular leucomalacia graded as described by deVries et al 25; IPE, intraparenchymatous echodensity; NA, not available; LV, lateral ventricles; WMS, white matter abnormal signal intensity; WMR, white matter reduction; GM, grey matter; SS, subarachnoid space; CC, corpus callosum; VC, visual cortex; OR, optic radiations.