Table 1.

Patient characteristics

		Mean	Standard Deviation	Minimum	Maximum	Count
Gestational age (weeks)		27.2	1.5	24.9	30.4
Birth weight (g)		1,039	288	670	1,775
Post-menstrual age MRI (weeks)		41.3	0.8	40.3	43.1
Weight at term-equivalent age (g)		3,496	480	2,285	4,735
Grade intra-ventricular haemorrhage	1					0
	2					25
	3					6
Ventriculo-peritoneal drain	Yes					2
	No					29
Gender	Female					11
	Male					20