Neurodevelopmental outcome in survivors of hypoxic ischemic encephalopathy without cerebral palsy.

To access outcome following hypoxic ischemic encephalopathy (HIE), survivors without cerebral palsy were invited for formal developmental assessment. Children aged ≥ 42 months were assessed using the NEPSY-2, Movement Assessment Battery for Children 2 (Movement ABC-2), Behavior Rating Inventory of Executive Function, and the Child Behavior Checklist. Children aged < 42 months were assessed using the Bayley Scales of Infant and Toddler Development, Third Edition (BSITD-3). One hundred forty-six children attended for assessments [Grade 1 (112), Grade 2 (33), and Grade 3 (1)]. BSITD-3 did not identify significant rates of impairment on cognitive, motor, or language subtests. A significant proportion of children scored < 3rd percentile on the adaptive behavior scale. In older age groups, difficulties were seen in 16/24 NEPSY-2 subtests and on timed assessments using Movement ABC-2. Difficulties arose especially in the "control" aspects of cognition and behavior. Behavioral difficulties were common with internalizing problems predominating. There was a graded effect with grade 2 cases differing significantly from grade 1 cases.
CONCLUSION: Following HIE, children may experience attention, memory, and behavior difficulties which are not always evident at a young age. The adaptive behavior questionnaire may be a useful tool to select children requiring developmental surveillance beyond 2 years of age. What is known: • Diversity of outcome across grades of HIE is reported and few studies have looked at the milder consequences of HIE at school age. What is new: • Following HIE children may experience attention, memory, and behavior difficulties which are not always evident at a young age. • The adaptive behavior questionnaire may be a useful tool to select children requiring developmental surveillance beyond 2 years of age.