Table 3.

Baseline Weight and Change in Weight z Score at Specific Time Points During the Neonatal Intensive Care Unit Stay.^a

	Study Group			P Valueb
Growth Parameters	All (n = 59)	EBM only (n = 41)	Controls (n = 134)	Study Group (All) vs Control	Study Group (EBM only) vs Control
z score at birth	−0.16 ± 0.6	−0.19 ± 0.6	−0.27 ± 0.5	.12	.38
z score at DOL 7	−0.97 ± 0.5	−1.01 ± 0.5	−1.02 ± 0.5	.40	.93
z score at start of transition	−1.02 ± 0.5	−1.1 ± 0.5	−1.1 ± 0.5	.25	.9
z score at end of transition	−1.1 ± 0.6	−1.2 ± 0.6	−1.3 ± 0.5	.008	.31
z score at CGA 35 weeks	−1.2 ± 0.7	−1.3 ± 0.7	−1.5 ± 0.6	.004	.22
Days to regain birth weight	12.1 ± 3.6	12.7 ± 3.9	12.2 ± 3.7	.69	.51
Growth velocity during transition, g/kg/d	16.1 ± 4.6	15.9 ± 4.6	13.2 ± 5.4	<.001	.007
Number of transition days	9.7 ± 3.5	10.2 ± 3.6	10 ± 5.3	.48	.81

CGA, corrected gestational age; DOL, day of life; EBM, exclusive breastmilk.

^aResults shown as mean ± SD.

^bP value derived by t test.