Before intervention | After intervention | p Value | |
---|---|---|---|
VEP data | |||
P1 latency in ms (mean±SD) | 222±18.4 | 188±18.7 | 0.02 |
Z score P1 latency (mean±SD) | 1.8±1.4 | −0.17±1.7 | 0.02 |
P1 latency within normal range (%) | 16.6% | 83.4% | |
N2 latency in ms (mean±SD) | 345±36.8 | 295±39.6 | <0.001 |
Z score N2 latency (mean±SD) | 3.7±1.4 | 1.0±1.7 | <0.001 |
N2 latency within normal range (%) | 5.8% | 58.8% | |
P2 latency in ms (mean±SD) | 512±59.9 | 421±48.9 | <0.001 |
Z score P2 latency (mean±SD) | 3.8±1.2 | 0.6±1.6 | <0.001 |
P2 latency within normal range (%) | 0% | 68.7% | |
Mean day of neurosurgical intervention (mean±SD) | 24.4±14.3 | ||
aEEG data | |||
aEEG score | 1±0.6 | 0.5±0.7 | 0.01 |
aEEG normal (%) | 23.5% | 58.8% | |
SWC present | 58.8% | 82.3% | 0.02 |
Seizures present | 29.4% | 11.7% | NS |
CUS data | |||
Ventricular width in mm (mean±SD) | 15.8±3.5 | 11.2±2.4 | <0.001 |
Ventricular index>97th percentile (%) | 94.1% | 47.1% | 0.005 |
Ventricular index>97th percentile+4 mm (%) | 58.8% | 0% | 0.002 |
AHW mm (mean±SD) | 6.6±2.2 | 3.8±1.5 | 0.005 |
TOD mm (mean±SD) | 24.2±4.5 | 16.5±3.9 | 0.009 |
Resistance index (mean±SD) | 0.8±0.07 | 0.77±0.06 | NS |
Sedative/analgetic/anticonvulsive medication | 52.9% | 47% | NS |
aEEG, amplitude-integrated electroencephalography; AHW, anterior horn width; CUS, cranial ultrasound; fVEPs, flash visual evoked potential; SWC, sleep-wake cycling; TOD, thalamo-occipital distance; VEP, visual evoked potential.