Factors that increase risk of recurrence of febrile seizures include all except
First degree relative with a history of febrile seizures, Age of onset less than 18 months of age, Temperature greater than 104 degrees Fahrenheit (40 degrees Celsius), and. Rapid onset (less than one hour between the onset of the fever and occurrence of a seizure) Ref Harrison20th edition pg 2134
Initial seizure at less than 12 months of age
Positive family history
Temperature more than 40degC
Complex seizures
C.N.S