Abstract TMP102: Predicting Recovery and Outcome After Pediatric Stroke

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We aimed to characterize the timing of recovery and predictors of outcome following pediatric stroke, with the hypothesis that the recovery pattern after stroke is influenced by age. While the immature brain is often presumed to have an increased capacity for neuroplasticity, there is little direct data examining how recovery differs in children of different ages. We reviewed data for children with arterial ischemic stroke (AIS) who were enrolled in the International Pediatric Stroke Study, a prospective registry of children with stroke. Inclusion criteria included a diagnosis of AIS and the availability of outcome at two years after the index stroke event. A subset of these patients who had multiple assessments over time were used to study longitudinal patterns of recovery. We investigated demographic, clinical, and radiologic associations with both early outcome at discharge and long term outcome at two years using multinomial logistic regression. Categorical outcomes at each timepoint were defined by Pediatric Stroke Outcome Measure (PSOM). We studied longitudinal recovery using time-to-event (survival) analysis. 614 out of 4,294 patients met our inclusion criteria. 202 patients had perinatal AIS while 412 had childhood AIS. Perinatal AIS was associated with significant worsening between discharge and two years, as neurologic impairment became more apparent, but with better outcomes at both timepoints compared with childhood AIS (moderate/severe: 14% vs 49% at discharge, 47% vs 54% at 2 years). Predictors of severe deficits in univariate analyses included age at stroke (perinatal vs. childhood), hemiparesis or decreased consciousness at presentation, anterior circulation, and large vessel involvement. In longitudinal analysis, improvement in PSOM occurred for a longer time after stroke onset in younger children compared to older children. Although age has a strong influence on recovery after pediatric stroke, all children had the capacity to demonstrate recovery over extended periods of time. Understanding the timing and predictors of recovery will allow us to better target therapies to the appropriate windows of opportunity, thereby improving outcomes after pediatric stroke.

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