Epidemiological data about severe hyperbilirubinaemia in neonates are scarce. We present results of a nationwide prospective study conducted in collaboration with the Swiss Federal Offi ce for Public Health and the Swiss Paediatric Surveillance Unit (SPSU). Data for all newborn patients
≥35 0/7 weeks of gestational age (GA) born between 1 January 2007 and 31 December 2008 with at least one value
of total serum bilirubin (TSB) exceeding the upper limit of exchange transfusion (ET) were included.