Table 1:

Comparison of GM-IVH groups for study variables^{^a}

GM-IVH Grade	I	II	III	IV	P
Brain stem SS (%)	45.5	95.5	95.5	95.5	<.001
Brain stem SS distribution	0 (140.6)	168.8 (140.6)	213.8 (106.9)	247.5 (163.1)	<.001
Spinal cord SSD (mm)	0 (0–0.8)	0.65 (0–1.1)	0.8 (0–1.5)	0.75 (0–1.5)	<.001
Medulla oblongata SSD (mm)	0 (0–0.8)	0.75 (0–1.2)	1 (0–1.7)	1 (0–2)	<.001
Pons SSD (mm)	0 (0–1.2)	0.6 (0–1.1)	0.8 (0–1.7)	0.85 (0–1.8)	<.001
Mesencephalon SSD (mm)	0 (0–0.9)	0.6 (0–1.1)	0.8 (0–1.6)	0.8 (0–2.3)	<.001
Lateral ventricle SSD (mm)	0.5 (0–1)	0.9 (0–3.3)	1 (0–2)	0.95 (0.4–2.5)	<.001
Third ventricle SSD (mm)	0 (0–0.2)	0 (0–1.6)	0 (0–2.2)	0.6 (0–1.2)	<.001
Fourth ventricle SSD (mm)	0 (0–0.8)	0.1 (0–0.9)	0.4 (0–1.9)	0.65 (0–2.2)	<.001
CN VII/VIII siderosis (%)	9.1	54.5	72.7	54.5	<.001
Total ventricular HV on HUS (mm³)	64.9 (79.8)	491.1 (358.7)	2168.7 (2469)	4319.4 (9731.5)	<.001
Total cerebellar HV (mm³)	0 (0–13.6)	0 (0–6333)	0 (0–530)	0.5 (0–1123)	.12
Cerebellar SS present (%)	31.8	77.3	72.7	59.1	.009
Cerebellar SS depth (mm)	0 (0–0.25)	0.3 (0–2)	0.35 (0–2.1)	0.43 (0–2.2)	.001
Cerebellar hematoma present (%)	27.3	45.5	27.3	50	.26