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Recurrence risk after a first remote symptomatic unprovoked seizure in childhood: a prospective study
J Ramos-Lizana1, J Aguirre-Rodríguez, P Aguilera-López
1Paediatric Neurology Unit, Department of Paediatrics, Torrecárdenas Hospital, Almería, Spain. jramoslizana@telefonica.net
Insights
Recurrence risk after a first remote symptomatic unprovoked seizure in childhood is significantly higher than previously thought. Todd
Area of Science:
- Pediatric Neurology
- Epileptology
- Clinical Neuroscience
Background:
- First unprovoked seizures in children are a common neurological presentation.
- Understanding recurrence risk is crucial for prognosis and management.
- Previous studies may have underestimated recurrence rates in specific pediatric populations.
Purpose of the Study:
- To determine the recurrence risk following a first remote symptomatic unprovoked seizure in children under 14 years.
- To identify factors associated with seizure recurrence in this cohort.
Main Methods:
- Prospective follow-up of 63 children (under 14 years) with a first remote symptomatic unprovoked seizure.
- Kaplan-Meier survival analysis to estimate recurrence risk at 6, 12, 18, and 24 months.
- Cox proportional hazards models (univariable and multivariable) to assess associated risk factors.
Main Results:
- High recurrence rates observed: 59% at 6 months, 76% at 12 months, and 87% at 24 months.
- Children with static encephalopathy showed similar high recurrence risks (79% at 12 months, 89% at 24 months).
- Todd's paresis was significantly associated with increased recurrence risk in multivariable analysis.
Conclusions:
- Recurrence risk after a first remote symptomatic unprovoked seizure in childhood is substantially higher than previously reported.
- The presence of Todd's paresis is a significant predictor of seizure recurrence.
- These findings highlight the need for careful monitoring and potentially tailored management strategies for affected children.
Abstract:
The aim of this study was to assess recurrence risk after a first remote symptomatic unprovoked seizure in childhood. All consecutive patients younger than 14 years with a first remote symptomatic unprovoked seizure who were seen at our hospital between 1994 and 2006 were included in the study and prospectively followed. Only two patients received antiepileptic treatment. Sixty-three children were included, with 35 males and 28 females. Mean age at first seizure was 4 years (SD 3y 5mo). Kaplan-Meier estimate of recurrence risk was 59% (95% confidence interval [CI] 47-71), 76% (95% CI 65-87), 85% (95% CI 76-94), and 87% (95% CI 78-96) at 6, 12, 18, and 24 months respectively. A total of 55 children out of 63 were affected by a static encephalopathy of pre- or perinatal origin. In this subgroup, recurrence risk at 12 and 24 months was 79% (95% CI 68-90) and 89% (95% CI 80-98). Univariable analysis using the Cox proportional hazards model showed that presence of global developmental delay/intellectual disability and Todd's paresis were associated with a significant increase in recurrence risk. In multivariable analysis, only Todd's paresis was significantly associated. Recurrence risk after a first remote symptomatic unprovoked seizure in childhood is much higher than what some previous studies suggests.
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