Table 1.

Demographic data of the subjects.

Characteristics	Study #1	Study #2
Number	10	12
Gestational Age (weeks)	25.8 ± 3.2	27.2 ± 4.0
Birth weight (g)	873 ± 473	1070 ± 574
Post-natal age (days)	75 ± 25	114 ± 23
Post-menstrual age (weeks)	36.6 ± 5.5	43.3 ± 6.7
Weight (g)	2045 ± 756	3022 ± 881
Length (cm)	42.3 ± 4.6	49.2 ± 4.8
Fronto-occipital circumference (cm)	30.0 ± 3.0	34.3 ± 2.4
Gender	2M:8F	4M:8F
Disease	7, isolated perforation	7, isolated perforation
	1, volvulus	1, volvulus
	1, NEC	3, NEC
	1, meconium plug	1, meconium plug
Bowel resection	None = 5	None = 4
	Small bowel = 4	Small bowel = 6
	Small and large bowel = 1	Small and large bowel = 2
Small bowel resection?	5 Y:5 N	8 Y:4 N
Ileocecal valve intact?	10 Y:0 N	11 Y:1 N