Table 2 List of secondary outcomes, including the levels of measurement

Maternal and placental variables

 Estimated total blood loss

mL

 Postpartum hemorrhage > 1000 mL

Yes/No

 Rupture of umbilical cord

Yes/No

 Placental weight

Gram

 Surgical site infection after caesarean section

Yes/No

Variables related to stabilization at birth

 Support during transition

Yes/No

 Use of supplemental oxygen

Yes/No

 Use of continuous positive airway pressure

Yes/No

 Use of positive pressure ventilation

Yes/No

 Use of endotracheal ventilation

Yes/No

 Use of chest compressions

Yes/No

 Use of epinephrin

Yes/No

 Number of lung inflations

Total number

 Number of sustained inflation

Total number

 Maximum FiO2 administered

Fraction

 Apgar scores at 1, 5, and 10 min

1–10

 Time to stabilization

Minutes and seconds

 Cord clamping time

Minutes and seconds

 Arterial umbilical cord pH

Infant variables

 Temperature at admission

Degrees Celsius

 Hemoglobin (< 24 h)

mmol/L

 Hematocrit

L/L

 Polycythemia (venous hematocrit > 0.65 l/l)

Yes/No

 Intubation (< 72 h)

Yes/No

 Respiratory distress syndrome

Yes/No

 Surfactant therapy

Yes/No

 Pneumothorax

Yes/No

 Pulmonary hemorrhage

Yes/No

 Pulmonary interstitial emphysema

Yes/No

 Oxygen requirement (> 21%)

Days

 Bronchopulmonary dysplasia [6, 7]

Yes/No

Stage

 Volume expansion (< 72 h)

Yes/No

 Inotropic use (< 72 h)

Yes/No

 Persistent ductus arteriosus requiring treatment

Yes/No

Treatment

 Highest bilirubin level

μmol/l

 Hyperbilirubinemia requiring therapy

Yes/No

Treatment

 Culture-proven early-onset sepsis

Yes/No

 Culture-proven late-onset sepsis

Yes/No

Total number

 Meningitis

Yes/No

 Necrotizing enterocolitis [8]

Yes/No

Stage, treatment

 Focal intestinal perforation

Yes/No

 Red blood cell transfusion

Yes/No

Total number

 Intraventricular hemorrhage [9]

Yes/No

Stage

 Post-hemorrhagic ventricular dilatation

Yes/No

Treatment

 Periventricular venous infarction [9]

Yes/No

 Periventricular leukomalacia [10]

Yes/No

Stage

 Cerebellar hemorrhage

Yes/No

 Seizures

Yes/No

 Retinopathy of prematurity [11]

Yes/No

Stage, treatment

 Retinopathy of prematurity plus disease [11]

Yes/No

 Mortality at 28 days postnatal age

Yes/No

 Mortality at 36 weeks PMA

Yes/No

 Mortality at hospital discharge

Yes/No

 Length of NICU stay

Days

 Length of hospital stay

Days

 Weight, length, and head circumference at discharge

Gram, cm