Socio-demographic risk factors associated with febrile seizures at Puducherry: a retrospective study

Background: Febrile seizures occur commonly in the under 5 age group and is associated with few risk factors causing its recurrence like very high fever, family history of seizures, low sodium levels and younger age of onset which are subject to seasonal and wide geographical variations. This study aimed at detecting the major risk factors associated with recurrent febrile seizures in an Indian population.Methods: A retrospective hospital-based study was conducted among a total of 300 cases aged 6 months to 5 years attending to the paediatric OPD with history of fever followed by febrile seizures. Information regarding socio-demographic and clinical variables associated with febrile seizure was collected and analyzed.Results: The mean age of the study participants was 25.6'2.2 months and majority (60%) were males. Family history of seizures was present in 25.3% (n=76) of the children with febrile seizures. Respiratory infections (73.3%) and gastroenteritis (17%) were the major infective reasons associated with the occurrence of febrile seizures followed by pneumonia (6.3%) and urinary tract infections (5%). Recurrence of FS was significantly higher among the children with family history of FS (p=0.009), age at onset lesser (p<0.001) and simple FS seizures.Conclusions: Younger age at onset and positive family history of seizures were important socio-demographic risk factors associated with recurrent febrile seizures.

Relationship between Recurrence in Febrile Seizures and Serum Zinc Levels / 대한소아신경학회지

PURPOSE: The etiology of febrile seizures is not yet ascertained but it is known that genetic factors, cytokines or trace elements are associated with pathogenesis of febrile seizures. Among them, zinc deficiency is known to play some role of pathogenesis of febrile seizures. We purposed to know the relation between recurrence of febrile seizures and serum zinc level. METHODS: The subjects were recurrent febrile seizures group who were admitted to our hospital from June 2003 to July 2005 because of more than 3 times febrile seizures. The other two control groups were simple febrile seizures and acute febrile illness groups admitted to our hospital in same period. Simple febrile seizures group showed no more seizure over 1 year after first onset. We investigated serum zinc level in each group. RESULTS: The number of patient in each group is 33 children. Recurrent febrile seizures group was composed of 20 boys and 13 girls (the ratio of 1.5:1) with an average age 30 months old. The mean serum zinc levels in the recurrent febrile seizures group (123.7+/-9.6 microgram/dL) were not statistically different from those of the simple febrile seizures group(112.5+/-8.9 microgram/dL). Both of the recurrent and simple febrile seizures groups had significantly lower serum zinc levels than the febrile illness group(154.1+/-6.8 microgram/dL). CONCLUSION: We suggested that serum zinc level is not relationship with recurrence of febrile seizures. Nevertheless, the fact remains that serum zinc level was decreased in recurrent and simple febrile seizures groups compared with acute febrile illness group.

Selection of High Risk Group According to Risk Factors of Recurrent Febrile Seizures / 대한소아신경학회지

PURPOSE: Febrile seizure affects 2 to 5% of children, but 30 to 40% of the children who already had febrile seizure experience another febrile seizure. We researched to define a high risk group of recurrent febrile seizures through investigating several risk factors. METHODS: We evaluated 342 patients who were admitted to our hospital or treated in the emergency room for their first febrile seizure from March, 1995 to August, 2001. We assessed various risk factors, such as age, the type of seizure, body temperature, serum sodium concentration, sex, neurologic abnormalities, and family history of febrile seizure or epilepsy. RESULTS: Age at the first febrile seizure(< or =18 months) and family history of febrile seizure were significant risk factors for recurrence of febrile seizure. The study showed that 21.9% of the children who had none of these risk factors, 36.4% of the children who had one, and 57.1% of the children who had both factors had recurrent febrile seizures. Thus, the recurrence rates clearly increase as the number of these factors increase. CONCLUSION: Two major risk factors for recurrent febrile seizures were identified:early onset(< or =18 months) and family history of febrile seizure. The risk of recurrent febrile seizures increased with the number of these risk factors increased. Consequently, children with both risk factors were considered to belong to a high risk group of recurrent febrile seizures.

Recurrence Rate of Febrile Seizures by Combining Risk Factors

PURPOSE: In previous studies, various risk factors for recurrent febrile seizures have been identified. But none of these risk factors alone could sufficiently discriminate children at high or low risk for recurrent seizures. Therefore, we tried to identify patients at high risk of recurrent febrile seizures by combining risk factors. METHODS: Two hundred and four children who had been admitted to our hospital from March, 1997 to July, 1999 with their first febrile seizures were enrolled in our study, and followed up over 2 years. We investigated the recurrence rate according to variables such as sex, age at first febrile seizure, family history of febrile seizures or epilepsy, type of the first seizure, neurologic abnormality and EEG abnormality. RESULTS: Family history of febrile seizures and age at first febrile seizure(or=12 months (no risk factor), 43.8%; the group with no family history and age or=12 months(one risk factor), 64.5%; group with family history and age <12 months(two risk factors), 90.4%. CONCLUSION: A correlation between numbers of risk factors and recurrence rate was present and the children with a family history of febrile seizures and a young age at onset(<12 months) were regarded as a high risk group of recurrence.