Table 2:

Demographic information on male and female babies with a high quality scan

	Total of 33 MRI Scans
	Males (n=19) GA range 28.00 – 41.14 wks		Females (n=14) GA range 24.00 – 40.00 wks
	Mean	(SD)	Mean	(SD)	t	P
GA, weeks	35.71	4.15	30.56	4.16	3.51	<0.01
Birth weight, grams	2545.62	1015.65	1519.10	760.40	3.18	<0.01
Age (months)#	12.65	1.42	12.71	1.44	0.12	0.90
SNAP2$	6.88	7.79	17.07	22.66	1.74	0.09
Parental SES*	2.63	0.68	2.78	0.64	0.68	0.50
Social-Emotional Scale@	105.60	12.76	96.67	24.52	1.26	0.22
General Adaptive Composite (GAC)@	100.9	9.79	90.41	14.00	2.28	0.03

^#Corrected for weeks premature in all infants with GA <39 weeks

^$Score for Neonatal Acute Physiology-II

^*Based on modified Hollingshead scale of 1-5 with lower numbers indicating higher SES

^@Social-Emotional and Adaptive Behavior Questionnaire from the Bayley Scales of Infant and Toddler Development III (Bayley-III) completed by 29/35 mothers of those infants who completed a scan and 17/32 mothers of those infants who did not complete a scan