Table 2

Associated predictor variables (covariates)

1Gender
2Caesarean section
3Multiple pregnancies
4Birth weight and height
5Small for gestational age, birth weight<2 SD
6Maternal smoking during pregnancy
7Preeclampsia, diagnosis by the responsible obstetrician
8Chorioamnionitis, clinical diagnosis by the responsible obstetrician
9Preterm premature rupture of membranes, rupture>1 hour before contractions started
10Antenatal antibiotics, pertaining the period of the mother’s actual attendance at the hospital
11Antenatal corticosteroids; the mother should have received at least 12 mg betamethasone. The corticosteroid prophylaxis is considered completed if the mother has received two doses at least 24 hours before delivery
12Born at level 1–2 NICUs
13NICU inclusion site
14Apgar score
15Surfactant-administration
16Intubation
17Infant respiratory distress syndrome, verified by X-ray
18Mechanical ventilation, duration
19Patent ductus arteriosus, requiring medical or surgical treatment
20Antibiotics, drug, treatment period and number of days
21Probiotics, name, treatment period and number of days
22Opioids, drug, treatment period and number of days
23Gastric acid inhibitors, drug, treatment period and number of days
24Day of life when the supplementation of the study product was started
25The amount of enteral feeds per day that the infants received when the supplementation of the study product was started
26Number of days the infant has not received the study product
27Intravenous lines, number of days
28Insulin treatment, number of days
29Postnatal corticosteroids, number of days
30Inotropic drugs, number of days
31Feeding regime, continuous or bolus
32Amount of nutrient protein fortifier per day
33Amount of fat supplement per day
34Total amount of protein, fat, carbohydrate, energy and micronutrient per day
35The relative amount of donor breast milk per day
36Amount of extra enteral lipid
37Breastfeeding, exclusive or partial
  • NICU, neonatal intensive care unit.