In this Austrian observational study preterm infants born with a birth weight \<1500 g and a gestational age \<32 weeks will be investigated at the neonatal outpatient clinic. Infants will be stratified according their feeding regimen (breast, formula and combined feeding) and their introduction of solid foods (early complementary feeding group: \<17th week of life corrected for prematurity, late complementary feeding group: ≥17th week of life corrected for prematurity). Nutrient intakes and anthropometric parameters will be assessed at term, 6 weeks, 12 weeks, 6 months, 9 months and 12 months - all corrected for prematurity and with 40, 54 and 66 months.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Is there a height difference of 5% at one year of age corrected for prematurity between different complementary feeding groups?
Timeframe: The patients will be recruited in the period of 04/2016 till 06/2021. The primary observation period is one year.The follow up period lasts until 06/2025