To determine the effects of higher versus lower sodium supplementation in preterm infants. We will undertake three comparisons.
- Higher (commencing ≥ 2 mmol/kg/day) versus lower (commencing < 2 mmol/kg/day) sodium supplementation in preterm infants less than 7 days of age.
- Higher (≥ 5 mmol/kg/day) versus lower (< 3mmol/kg/day) or intermediate (≥ 3mmol/kg/day to < 5 mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age.
- Higher (≥ 5 mmol/kg/day) versus lower (< 3mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age.
- Higher (≥ 5 mmol/kg/day) versus intermediate (≥ 3mmol/kg/day to < 5 mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age.
- Intermediate (≥ 3mmol/kg/day to < 5 mmol/kg/day) versus lower (< 3mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age.
- Early and late higher versus lower sodium intake.
- Higher (commencing ≥ 2 mmol/kg/day) or lower (commencing < 2 mmol/kg/day) sodium supplementation in preterm infants less than 7 days of age, and either:
- higher (≥ 5 mmol/kg/day) versus lower (< 3mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age; or
- higher (≥ 5 mmol/kg/day) versus intermediate (≥ 3mmol/kg/day to < 5 mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age; or
- intermediate (≥ 3mmol/kg/day to < 5 mmol/kg/day) versus lower (< 3mmol/kg/day) sodium supplementation in preterm infants ≥ 7 days of age.
This is a protocol.