Trends in Extreme Neonatal Hyperbilirubinaemia: A Longitudinal Population‐Based Case‐Control Study

The incidence of extreme hyperbilirubinaemia stayed mostly stable over 12 years in South Australia and was higher than previously described via voluntary clinician reporting. Population-based surveillance monitoring via laboratory systems is likely to be more reliable than voluntary clinician reporting. A spike in incidence in 2020 may have occurred due to pandemic-related changes in maternity and neonatal care practices.