Trends in long term growth outcome: comparison of two birth cohorts (year 2007-08 and year 2015-16).

Very low birth weight (VLBW) infants comprise between 4% and 8% of live-births and about one-third of deaths during the neonatal period. The objective of the study is to evaluate and compare the long-term growth outcomes of VLBW infants among two different birth cohorts: Cohort 2007-08 (cohort 1) and cohort 2015-16 (cohort 2), in a cross-sectional observational study. The neonatal and perinatal data of cohort 1 was collected from available trial data and the same data from cohort 2 was collected from patient case files and patient history.