Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Mortality
Systematic review	675 infants with evidence of perinatal asphyxia and hypoxic–ischaemic encephalopathy 7 RCTs in this analysis	Mortality 15/348 (4%) with hyperbaric oxygen 51/327 (16%) with control	OR 0.26 95% CI 0.14 to 0.46	Moderate effect size	hyperbaric oxygen