A screening test for the prediction of Dravet syndrome before one year of age.

Abstract:

PURPOSE:Our aim was to develop a screening test to predict Dravet syndrome before the first birthday based on the clinical characteristics of infants and the SCN1A mutation analysis. METHODS:Ninety-six patients who experienced febrile seizures before the age of one were enrolled. The patients were divided into two groups-the Dravet syndrome group (n = 46) and the non-Dravet syndrome group (n = 50). We compared the clinical characteristics before one year of age of the two groups. We analyzed all coding exons of the SCN1A gene by the direct sequencing method. Scores from 0 to 3 were assigned to each risk factor based on the odds ratio and p-value. RESULTS:An age of onset of febrile seizure or= 5, and prolonged seizures lasting more than 10 min. were regarded as significant risk factors for Dravet syndrome. Other factors highly predictive of this syndrome were hemiconvulsions, partial seizures, myoclonic seizures, and hot water-induced seizures. A total clinical score of six or above was the cutoff value indicating a high risk of Dravet syndrome. SCN1A missense and truncated mutations were detected significantly more often in the Dravet syndrome group than in the non-Dravet syndrome group. DISCUSSION:This simple screening test was designed to be used by general pediatricians. It could help to predict Dravet syndrome before one year of age. If the sum of the clinical risk score is >or= 6, then the performance of an SCN1A mutation analysis is recommended.

journal_name

Epilepsia

journal_title

Epilepsia

authors

Hattori J,Ouchida M,Ono J,Miyake S,Maniwa S,Mimaki N,Ohtsuka Y,Ohmori I

doi

10.1111/j.1528-1167.2007.01475.x

subject

Has Abstract

pub_date

2008-04-01 00:00:00

pages

626-33

issue

4

eissn

0013-9580

issn

1528-1167

pii

EPI1475

journal_volume

49

pub_type

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