Risk factors for epilepsy in a rural area in Tanzania. A community-based case-control study.

BACKGROUND AND METHODS: The high prevalence of epilepsy detected in rural Tanzania by Dr. Jilek-Aall since 1960, was verified by the World Health Organization (WHO) survey on neurological and seizure disorders. Neurologists and psychiatrists further interviewed both patients and controls using standard methods. The presence of possible risk factors was complemented by corroborative evidence through interviewing close relatives and scrutinizing medical records. Seizures were classified based on clinical symptoms and the use of EEG. RESULTS: A family history of epilepsy in first-degree relatives was found in 46.6% of patients, but in only 19.6% of controls. The odds ratio for family history with epilepsy was 3.52 (95% confidence interval, CI 2.4-5.74, p < 0.001). A past history of febrile convulsion was found in 44% of patients in comparison to 23% of the control group which was significant (odds ratio 2.4, 95% CI 1.5-3.8; p < 0.001). A history of intrapartum complications was found in 12.1% of patients and 1.8% of controls (odds ratio 7.3, 95% CI 2.5-25.2; p < 0.002). Head injury was not a significant risk factor for epilepsy in this rural community. CONCLUSION: The results indicated a strongly independent association between four factors and the risk of developing epilepsy. It would seem more likely that previous brain insults/diseases play a significant major role in the cause of epilepsy in the Mahenge area. However, a genetic predisposition to low threshold for convulsions cannot be excluded.

Knowledge, attitude, and practice toward epilepsy among rural Tanzanian residents.

Before a health education program can be established, one must first know what the target population believes and does with respect to the disease in question. Therefore, we performed a study among Tanzanian rural inhabitants to identify their knowledge, attitude, and practice (KAP) toward epilepsy: 3,256 heads of households (mean age 40.2 years, range 15-90 years; M/F ratio 1:1) were interviewed. Of the respondents, 32.9% said they had never seen a seizure; 67.7% said they did not know the cause of epilepsy; 33.3% mentioned various causes including heredity, witchcraft, infection of the spinal cord, hernia; 40.6% believed epilepsy was infectious through physical contact, flatus, breath, excretions, sharing food; 36.8% believed epilepsy could not be cured and 17.1% believed it could not even be controlled; 45.3% believed epilepsy could be treated by traditional healers, and only 50.8% believed hospital drugs were of any use; and 62.7% of the respondents would not allow an epileptic child to go to school for various reasons, including mental subnormality (54.0%), fear of the child falling while alone (65.9%), and fear that the epileptic child would infect other children (11.2%). Concerning what is to be done when a seizure occurs, 33.5% of the respondents would keep away and not touch the person; 16.5% would take some potentially harmful measure such as forcing a mouth gag or forcing a drink such as water (1 even mentioned urine); 5.2% would take unnecessary measures such as rushing the patient to a hospital. Only 35.7% of respondents would perform at least some of the currently recommended first-aid measures.(ABSTRACT TRUNCATED AT 250 WORDS)

Prevalence and incidence of epilepsy in Ulanga, a rural Tanzanian district: a community-based study.

A random cluster sample survey of approximately 18,000 people in 11 villages was performed in Ulanga, a Tanzanian district with a population of approximately 139,000 people. Well-instructed fourth-year medical students and neurologic and psychiatry nurses identified persons with epilepsy using a screening questionnaire and sent them to a neurologist for detailed evaluation. Identified were 207 subjects (88 male, 119 female) with epilepsy; of these, 185 (89.4%) (80 male, 105 female) had active epilepsy. The prevalence of active epilepsy was 10.2 in 1,000. Prevalence among villages varied, ranging from 5.1 to 37.1 in 1,000 (age-adjusted 5.8-37.0). In a 10-year period (1979-1988) 122 subjects living in the 11 villages developed epilepsy, with an annual incidence of 73.3 in 100,000. Generalized tonic-clonic seizures (GTCS) accounted for 58% and partial seizures accounted for 31.9%, whereas in 10.1% seizures were unclassifiable. Of the partial seizures, secondarily generalized seizures were the most common. Possible etiologic or associated factors were identifiable in only 25.3% of cases. Febrile convulsions were associated in 13.4 of cases. Other associated factors included unspecified encephalitis (4.7%), cerebral malaria (1.9%), birth injury (1.4%), and other (3%). In 38% of the cases, there was a positive family history of epilepsy.