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Table 2 Characteristics of PN and EN support (n = 163)

From: Optimizing parenteral nutrition to achieve an adequate weight gain according to the current guidelines in preterm infants with birth weight less than 1500 g: a prospective observational study

Characteristic Value
Duration of PN, days 30 (21, 40)
Average PN glucose during the first postnatal week, g/kg/d 7.5 (6.4, 8.5)
Average PN amino acid during the first postnatal week, g/kg/d 2.4 (2.1, 2.7)
Average PN lipid during the first postnatal week, g/kg/d 0.8 (0.4, 1.2)
Average PN energy during the first postnatal week, kcal/kg/d 48 (40, 52)
Maximum PN glucose, g/kg/d 11.2 (9.3, 13.0)
Maximum PN amino acid, g/kg/d 3.5 (3.2, 3.8)
Maximum PN lipid, g/kg/d 3.0 (2.6, 3.2)
Maximum PN energy, kcal/kg/d 78 (68, 88)
Days to reach maximum PN glucose, days 10 (6, 18)
Days to reach maximum PN amino acid, days 9 (6, 13)
Days to reach maximum PN lipid, days 12 (9, 17)
Days to reach maximum PN energy, days 11 (8, 17)
Days to start PN lipid, days 4 (2, 5)
PN amino acid, n (%)
 Day 1, >  1.5 g/kg/d 64 (39.3)
 Day 2, >  2.5 g/kg/d 11 (6.7)
 Day 7, >  2.5 g/kg/d 132 (81.0)
PN lipid, n (%)
 Day 1, yes 4 (2.5)
 Day 2, yes 1 (0.6)
 Day 7, yes 138 (84.7)
Day of life of first enteral feed, n (%)
 Day 1 27 (16.6)
 Day 2 58 (35.6)
 ≥ Day 3 78 (47.8)
Days to reach full enteral feed, days 30 (23, 42)
EN energy when PN stopped, kcal/kg/d 108 (100, 115)
Episodes of EN interruption, n (%)
 0 104 (63.8)
 1 36 (22.1)
 2 12 (7.4)
 3 9 (5.5)
 4 2 (1.2)
  1. PN parenteral nutrition, EN enteral nutrition. Continuous variables are presented as median (interquartile)