The review found no eligible studies for this question.
It is very uncertain whether A dose of vitamin D 601 IU or higher changes low birthweight compared with 600 IU or lower alone or with other nutrients (very low certainty).
It is very uncertain whether higher changes all‐cause mortality: range 1 mo to 1 y compared with lower FiO2 or targets of arterial oxygenation (very low certainty).
It is very uncertain whether higher changes proportion of participants with ≥ 1 serious adverse events according… compared with lower FiO2 or targets of arterial oxygenation (very low certainty).
It is very uncertain whether higher changes lung injury diagnosed after randomisation (composite outcome): range… compared with lower FiO2 or targets of arterial oxygenation (very low certainty).
It is very uncertain whether higher changes myocardial infarction diagnosed after randomisation: range ≤ 90 d compared with lower FiO2 or targets of arterial oxygenation (very low certainty).
It is very uncertain whether higher changes stroke diagnosed after randomisation: range 1 mo to 3 mo compared with lower FiO2 or targets of arterial oxygenation (very low certainty).
It is very uncertain whether higher changes sepsis diagnosed after randomisation: range 28 d to 60 d compared with lower FiO2 or targets of arterial oxygenation (very low certainty).
Higher showed no clear difference in mortality to hospital discharge compared with lower amino acid intake (low certainty).
It is very uncertain whether higher changes neurodevelopmental disability compared with lower amino acid intake (very low certainty).
It is very uncertain whether higher changes postnatal growth failure at discharge (weight < 10th centile) compared with lower amino acid intake (very low certainty).
It is very uncertain whether higher changes retinopathy of prematurity compared with lower amino acid intake (very low certainty).
Higher leads to higher abnormal blood urea nitrogen (various criteria) compared with lower amino acid intake (high certainty).