Intellectual disability in cerebral palsy: a population-based retrospective study

Area of Science:

• Neurology
• Developmental Pediatrics
• Public Health

Background:

• Cerebral palsy (CP) is a common neurodevelopmental disorder.
• Intellectual disability (ID) frequently co-occurs with CP, impacting overall health outcomes.
• Understanding the epidemiology and associations of ID in CP is crucial for improving care.

Purpose of the Study:

• To describe the epidemiology of intellectual disability in cerebral palsy.
• To identify clinical and neuroimaging associations with intellectual disability in CP.
• To report the impact of intellectual disability on health service utilization and survival in CP.

Main Methods:

• Population-based observational study using CP registry data.
• Retrospective assessment of intellectual disability frequency and associated factors (mobility, epilepsy, sensory, communication, neuroimaging).
• Data linkage for healthcare service utilization and survival analysis in a 30-year birth cohort.

Main Results:

• Intellectual disability was present in 45% of the CP cohort.
• ID associated with severe motor impairment, epilepsy, and specific neuroimaging findings (grey matter injuries, malformations).
• Individuals with ID experienced higher hospital admission rates and reduced 35-year survival.

Conclusions:

• Intellectual disability significantly increases medical complexity and health disparities in individuals with CP.
• Cerebral maldevelopments and grey matter injuries are linked to higher ID rates in CP.
• Co-occurring intellectual disability in CP necessitates proactive healthcare management and impacts long-term survival.