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Recurrent febrile seizures occurred in 94 of the 347 children(27 percent) with a cumulative risk of 25 percent at one year and 30 percent at two years.The duration of fever before the initial seizure was associated with the risk of recurrence at one year:for fever lasting less than 1 hour,the risk of recurrence was 44 percent;for fever lasting 1 to 24 hours,23 percent;and for fever lasting more than 24 hours,13 percent(P<0.001).With each degree of increase in temperature(in degrees Fahrenheit),from 101 degrees F(38.3 degrees C)to>/=105 degrees F(40.6 degrees C),the risk of recurrence at one year declined,from 35 percent to 30,26,20,and 13 percent (P for trend=0.024).An age of less than 18 months and a family history of febrile seizures were also associated with an increased risk of recurrence.A family history of epilepsy,complex febrile seizures,and neurodevelpmental abnormalities did not increase the risk of recurrent febrile seizures.A shorter duration of fever before the initial febrile seizure and a lower temperature are associated with an increased risk of recurrence in children who have febrile seizures. |
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fever
seizure
seizure,febrile
seizure,prognosis in childhood
seizure,risk factors for
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