P81 What is the ideal target preterm population that might benefit from the expensive palivizumab prophylaxis?

IntroductionPalivizumab is a monoclonal antibody that reduces the likelihood of serious respiratory tract infection by Respiratory Syncytial Virus (RSV) in infants with Chronic Lung Disease (CLD) defined as an ongoing oxygen requirement at 36 weeks corrected gestation. In the UK (UK), Palivizumab is offered to high-risk infants with moderate to severe CLD according to their chronological age at the time of RSV season as per Joint Committee on Vaccination and Immunisation (JCVI) guidelines. The American Academy of Paediatrics, in contrast, recommends Palivizumab prophylaxis for all infants born before 29 weeks’ gestation who are younger than 12 months at the start of the RSV season.Materials and MethodsWe hypothesised that the RSV hospitalisation rate and length of hospital stay (LOS) within the 1 st year of life between preterm babies with CLD immunised according to the JCVI criteria (CLDJCVI) and the additional babies who are considered eligible by the AAP criteria would be comparable. Our cohort included babies born in Nottingham UK between 2009 and 2015. Data was collected from hospital records and the Nottingham CLD database, and analysed using Fisher’s exact test for proportions and Mann-Whitney test for continuous data.ResultsIn total there were 3478 babies born preterm (