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KMID : 0391520160240020033
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Journal of the Korean Child Neurology Society
2016 Volume.24 No. 2 p.33 ~ p.37
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Diurnal Variation of Febrile Seizures
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Kim Gu-tae
Byun Jun-Chul
Kwon Soon-Hak
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Abstract
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Purpose: Febrile seizures are the most common type of seizure disorders in children. The aim of this study is to understand the diurnal variation of febrile seizures by analyzing the differences in frequency, pattern and severity according to time.
Methods: This is a prospective single-centered specialized questionnaire-based study. Three hundred and sixty-two children diagnosed with febrile seizure from May, 2011 to May, 2013 in emergency center of Daegu Fatima Hospital were involved. We evaluated the diurnal occurrence of febrile seizures for age, sex, body temperature, time of occurrence, duration, type, and family history.
Results: Febrile seizures occurred more in the afternoon. The incidence of febrile seizures between 2 pm and 6 pm (group II) was approximately three times more (P=0.001) than that of between 2 am and 6 am (group I). The distribution curve revealed that the peak occurrence of febrile seizures was between 4 pm and 5 pm. The proportion of patients with body temperature over 40℃ was significantly higher in group I than group II (P=0.03). There was no statistically significant difference for temperature, duration and type of seizures between two groups.
Conclusion: Febrile seizures showed diurnal change in the frequency of occurrence. They seem to occur in the afternoon more frequently when the body temperature set point is elevated physiologically. Although the property and severity of febrile seizure was not altered by circadian rhythm of body temperature, its diurnal change in the frequency of occurrence might be attributable to a change in the thermoregulatory set point.
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KEYWORD
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Febrile seizure, Diurnal variation, Circadian rhythm, Child
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