Table 2 Primary and secondary outcomes in the low and normal superior vena cava (SVC) flow groups

	Low SVC	Normal SVC	Two sided p value
Early neonatal death (%)	12.5	0	0.21
IVH ⩾2 day 7 (%)	42.9	6.7	0.037
Early neonatal death or IVH ⩾2 (%)	50	6.7	0.012
RVO (ml/kg/min) (median)	264	260	0.84
LVO (ml/kg/min) (median)	341	351	0.17
Mean velocity ACA (cm/s) (median)	13.6	14.3	0.7

ACA, anterior cerebral artery; IVH, intraventricular haemorrhage; LVO, low ventricular output; RVO, right ventricular output.