Table 1.

Infant characteristics

Characteristic	Group of interest	Phase 1		Phase 2		p Value
		n/N	(%)	n/N	(%)
Gender	Male	64/128	(50)	62/117	(54)	0.64
Twin	Yes	16/128	(13)	25/117	(21)	0.06
	Units	Mean	(N, SD)	Mean	(N, SD)	p Value
Birth weight	kg	1.70	(128, 0.50)	1.65	(114, 0.45)	0.44
Gestational age	Weeks/days	31 weeks 5 days	(128, 13 days)	31 weeks 4 days	(117, 12 days)	0.59