This tool is based on synthetic data created from the National Neonatal Research Database (NNRD). Synthetic data is artificially generated data that replicates the structure and patterns of real data but does not contain any actual patient information. The original data describe babies born before 32 weeks and admitted to neonatal units in England and Wales between August 2022 and December 2024. A statistical model was trained using five factors: gestational age, sex, antenatal steroid use, multiple birth, and birth weight