The presence of certain clinical factors may indicate an increased risk for additional febrile seizures after the occurrence of the first febrile seizure in a young child.
Risk factors for additional febrile seizures:
(1) young age at onset
(2) history of febrile seizures in a first degree relative
(3) low degree of fever while in the Emergency Department
(4) a brief interval between the onset of fever and the initial seizure
Parameter
Finding
Points
age at onset
< 18 months
1
>= 18 months
0
history of febrile seizures in a first degree relative
absent
0
present
1
temperature in °C
< 40°C
1
>= 40°C
0
interval between onset of fever and initial seizure
< 1 hour
1
>= 1 hour
0
risk score =
= SUM(points for parameters present)
Interpretation:
• minimum score: 0
• maximum score: 4
Risk Score
Risk of 1 Recurrence
Risk of 2 Recurrences
Risk of 3 Recurrences
0
14%
5%
0%
1
24%
8%
3%
2
32%
14%
7%
3
62%
32%
11%
4
75%
62%
12%
extracted from Figure 2, page 375
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