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Ann Child Neurol > Volume 26(4); 2018 > Article
Journal of the Korean Child Neurology Society 2018;26(4):227-232.
DOI: https://doi.org/10.26815/jkcns.2018.26.4.227    Published online December 31, 2018.
Impact of Weather on Prevalence of Febrile Seizures in Children
Jung Hee Woo, Seok Bin Oh, Chung Hyuk Yim, Jung Hye Byeon, Baik- Lin Eun
Department of Pediatrics, Korea University College of Medicine, Seoul, Korea
Correspondence:  Jung Hye Byeon, Tel: +82-2-920-5090, Fax: +82-2-922-7476, 
Email: pedbyeon@naver.com
Received: 7 September 2018   • Revised: 1 October 2018   • Accepted: 9 October 2018
Abstract
Purpose
Febrile seizure (FS) is the most common type of seizure in children between 6 months to 5 years of age. A family history of febrile seizures can increase the risk a child will have a FS. Yet, prevalence of FS regarding external environment has not been clearly proved. This study attempts to determine the association between prevalence of FS and weather.
Methods
This study included medical records from the Korea National Health Insurance Review and Assessment Service. Data were collected from 29,240 children, born after 2004, diagnosed with FS who were admitted to one of the hospitals in Seoul, Korea, between January 2009 and December 2013. During the corresponding time period, data from the Korea Meteorological Administration on daily monitoring of four meteorological factors (sea-level pressure, amount of precipitation, humidity and temperature) were collected. The relationships of FS prevalence and each meteorological factor will be designed using Poisson generalized additive model (GAM). Also, the contributory effect of viral infections on FS prevalence and weather will be discussed.
Results
The amount of precipitation was divided into two groups for comparison: one with less than 5 mm and the other with equal to or more than 5 mm. As a result of Poisson GAM, higher prevalence of FS showed a correlation with smaller amount of precipitation. Smoothing function was used to classify the relationships between three variables (sea-level pressure, humidity, and temperature) and prevalence of FS. FS prevalence was correlated with lower sea-level pressure and lower humidity. FS prevalence was high in two temperature ranges (-7 to -1°C and 18–21°C).
Conclusion
Low sea-level pressure, small amount of precipitation, and low relative air humidity may increase FS prevalence risk.
Key Words: Seizures, Fever, Weather, Humidity, Temperature


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