Cognitive outcomes following pediatric epilepsy surgery

Area of Science:

• Pediatric Neurology
• Neuropsychology
• Epilepsy Surgery Outcomes

Background:

• Pharmacoresistant epilepsy in children often necessitates surgical intervention.
• Assessing cognitive outcomes post-pediatric epilepsy surgery is crucial for patient management.
• Traditional methods for evaluating cognitive change may not accurately reflect real-world impact.

Purpose of the Study:

• To characterize cognitive outcomes after pediatric epilepsy surgery using reliable change indices (RCIs).
• To compare RCI-based outcomes with traditional standard deviation (SD) methods.
• To identify factors influencing postoperative cognitive changes.

Main Methods:

• Retrospective cohort study of 186 children undergoing epilepsy surgery.
• Neuropsychological assessments administered pre- and post-surgery (approx. 6.5 months).
• Cognitive change classified using epilepsy-specific RCIs and compared to SD cutoffs; multinomial regression used to identify influencing factors.

Main Results:

• Most children (82%) showed focal cognitive changes (1-2 domains), with variable rates of decline (4-35%) and improvement (2-31%).
• Reliable change indices (RCIs) provided a more nuanced view of cognitive change compared to standard deviation (SD) methods.
• Preoperative performance, age, surgery site, and postoperative seizures were associated with cognitive changes.

Conclusions:

• Pediatric epilepsy surgery is associated with substantial variability in individual cognitive outcomes.
• Epilepsy-specific RCIs are essential for accurate assessment of cognitive change post-surgery.
• Identifying factors associated with cognitive change can inform future prediction models for clinical decision-making and counseling.