Early (less than seven days following birth) higher showed no clear difference in hyponatraemia (< 130 mmol/L) compared with lower sodium intake (low certainty).
Early (less than seven days following birth) higher showed no clear difference in hypernatraemia (≥ 150 mmol/L) compared with lower sodium intake (low certainty).
It is very uncertain whether early (less than seven days following birth) higher changes necrotising enterocolitis compared with lower sodium intake (very low certainty).
Lower genital tract infection screening probably leads to lower preterm low birthweight (below or equal 2500 g) compared with no screening (moderate certainty).
Lower genital tract infection screening probably leads to lower preterm very low birthweight (below or equal 1500 g) compared with no screening (moderate certainty).
High showed no clear difference in extrauterine growth restriction at discharge compared with standard volume of fortified human milk or preterm formula (low certainty).
It is very uncertain whether high changes necrotising enterocolitis compared with standard volume of fortified human milk or preterm formula (very low certainty).
Lower showed no clear difference in mortality, near term corrected age or discharge compared with higher oxygen concentrations titrated to target oxygen saturations… (low certainty).
Lower showed no clear difference in neurodevelopmental disability compared with higher oxygen concentrations titrated to target oxygen saturations… (low certainty).
Lower showed no clear difference in intubation in the delivery room compared with higher oxygen concentrations titrated to target oxygen saturations… (low certainty).
Lower showed no clear difference in severe retinopathy of prematurity (≥ stage 3) compared with higher oxygen concentrations titrated to target oxygen saturations… (low certainty).
Lower showed no clear difference in severe intraventricular haemorrhage (grade 3 or 4) compared with higher oxygen concentrations titrated to target oxygen saturations… (low certainty).
Lower showed no clear difference in necrotising enterocolitis compared with higher oxygen concentrations titrated to target oxygen saturations… (low certainty).
It is very uncertain whether lower changes chronic lung disease (36 weeks' corrected age) compared with higher oxygen concentrations titrated to target oxygen saturations… (very low certainty).