Intellectual impairment in patients with epilepsy in Ile-Ife, Nigeria.
BACKGROUND
Epilepsy is the most common non-infectious neurologic disease in developing countries such as Africa, including Nigeria. This study was designed to assess the intellectual performance of patients with epilepsy (PWE) in Nigeria hoping that the result will serve as the basis for educational, vocational, and social counseling.


METHODS
Forty-one PWE were studied along with 41 age-, sex- and education-matched healthy controls. A questionnaire was developed and applied to all subjects and history was taken from patients and eyewitness. The intellectual function of each subject was assessed with the aid of Wechsler Adult Intelligence Scale adapted for Nigerians. All patients subsequently had electroencephalography (EEG) performed and the EEG findings were noted. SPSS statistical package was used to analyze the data.


RESULTS
The PWE performed poorly on the verbal IQ, performance IQ, and full scale IQ scores when compared with controls (P < 0.05) and 20% of PWE had mental retardation. Long duration of epilepsy, long duration of antiepileptic drug therapy, younger age at onset of epilepsy, increased frequency of seizures, and low educational status were found to have negative impacts on intellectual performance in PWE (P < 0.05) while seizure types and type of antiepileptic drugs (carbamazepine or phenytoin) did not influence intellectual performance.


CONCLUSIONS
This study shows that PWE had significant intellectual impairment when compared with controls. In addition, long duration of epilepsy, long duration of AED therapy, earlier age of onset, increased seizure frequency, and low educational status had a negative impact on intellectual functioning in PWE.
Sunmonu
T A
TA
Neurology Unit, Department of Medicine, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, Nigeria. taosunmonu@yahoo.com
Komolafe
M A
MA
Ogunrin
A O
AO
Oladimeji
B Y
BY
Ogunniyi
A
A
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D017668:Age of Onset; D000927:Anticonvulsants / Q000009:adverse effects; D003072:Cognition Disorders / Q000175:diagnosis* / Q000209:etiology* / Q000503:physiopathology; D004185:Disability Evaluation; D004522:Educational Status; D004569:Electroencephalography; D004827:Epilepsy / Q000150:complications* / Q000188:drug therapy / Q000523:psychology; D005260:Female; D006801:Humans; D007360:Intelligence / Q000187:drug effects / Q000502:physiology*; D007361:Intelligence Tests; D008297:Male; D009483:Neuropsychological Tests; D009549:Nigeria; D011795:Surveys and Questionnaires
D000927:Anticonvulsants