The purpose of this study is to evaluate the association between perinatal asphyxia, neonatal encephalopathy, and childhood hearing impairment. This is a population-based study including all Norwegian infants born≥36 weeks gestation between 1999 and 2014 and alive at 2 years (n=866,232). Data was linked from fve national health registries with follow-up through 2019. Perinatal asphyxia was defned ...