Table 3.

Growth velocities and anthropometry of the study population.

Variable	HMF Group (n = 96)	BMF Group (n = 96)	p-Value
	Median (IQR)	Median (IQR)
Hierarchical structure of endpoints
Growth velocity (g/kg/d) birth to 37+0 weeks	15.2 (14.2, 16.7)	15.6 (13.9, 16.7)	n.s.
Growth velocity (g/kg/d) fortifier introduction to 32+0 weeks	16.5 (14.5, 19.1)	18.9 (15.3, 21.3)	0.009
Growth velocity (g/kg/d) birth to fortifier introduction	13.5 (7.4, 16.8)	10.7 (4.8, 15.3)	0.09
Growth velocity (g/kg/d) birth to 32+0 weeks	15.3 (14.0, 17.7)	15.1 (13.6, 17.0)	n.s.
Growth velocity (g/kg/d) 32+0 to 37+0 weeks	15.5 (13.2, 17.2)	15.9 (13.9, 17.7)	n.s.
32+0 weeks of gestational age
weight (g)	1442 (1267, 1580)	1430 (1240, 1598)	n.s.
weight (zscore)	−1.0 (−1.5, −0.7)	−1.1 (−1.5, −0.6)	n.s.
length increase (cm/week)	1.0 (0.7, 1.3)	0.9 (0.6, 1.3)	n.s.
length (cm)	38.0 (36.0, 39.4)	38.0 (36.7, 39.5)	n.s.
length (zscore)	−2.1 (−2.9, −1.5)	−2.1 (−2.6, −1.5)	n.s.
head circumference increase (cm/week)	0.6 (0.4, 0.8)	0.6 (0.4, 0.8)	n.s.
head circumference (cm)	26.5 (25.3, 27.5)	26.6 (25.5, 27.5)	n.s.
head circumference (zscore)	−2.0 (−2.8, −1.5)	−2.0 (−2.0, −1.4)	n.s.
37+0 weeks of gestational age
weight (g)	2500 (2136, 2722)	2427 (2155, 2722)	n.s.
weight (zscore)	−1.0 (−1.8, −0.6)	−1.2 (−1.8, −0.6)	n.s.
length gain (cm/week)	1.1 (1.0, 1.3)	1.1 (0.9, 1.2)	n.s.
length (cm)	44.0 (43.0, 45.5)	44.5 (43.0, 46.0)	n.s.
length (zscore)	−1.9 (−2.3, −1.2)	−1.7 (−2.3, −1.0)	n.s.
head circumference gain (cm/week)	0.8 (0.7, 0.9)	0.8 (0.7, 0.8)	n.s.
head circumference (cm)	31.2 (30.0, 32.0)	31.5 (30.5, 32.5)	n.s.
head circumference (zscore)	−1.3 (−2.0, −0.9)	−1.2 (−1.7, −0.6)	n.s.

HM = human milk, HMF = human milk based fortifier, BMF = bovine based human milk fortifier; Mann-Whitney U test.