The findings closest to your search, judged one by one by TypeSafe's Jev model.
A dose of vitamin D 601 IU or higher showed no clear difference in preterm birth compared with 600 IU or lower alone or with other nutrients (low 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).
It is very uncertain whether early and late (day 1 to 28 after birth) higher changes hypernatraemia (≥ 150 mmol/L) compared with lower sodium intake (very low certainty).
Late (seven days or more following birth) higher may leads to lower hyponatraemia (< 130 mmol/L) compared with lower sodium intake (low certainty).
It is very uncertain whether late (seven days or more following birth) higher changes hypernatraemia (≥ 150 mmol/L) compared with lower sodium intake (very low certainty).
Late (seven days or more following birth) higher may leads to lower postnatal growth failure (weight < 10th percentile) compared with lower sodium intake (low certainty).
It is very uncertain whether late (seven days or more following birth) higher changes necrotising enterocolitis compared with lower sodium intake (very low certainty).
It is very uncertain whether late (seven days or more following birth) higher changes chronic lung disease compared with lower sodium intake (very low certainty).
It is very uncertain whether late (seven days or more following birth) higher changes mortality (latest time reported up to hospital discharge) compared with lower sodium intake (very low certainty).