The following prognostic criteria were found: generalized type of seizures, focal type of seizures with secondary generalization, epileptiform (peak and/or peak-wave) activity, focal character of epileptiform activity, generalized type of seizures in the combination with slow wave background activity on EEG, generalized type of seizures in the combination with slow wave activity and disorganized activity on EEG.

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for the total samples and a mean age of 10.71 + 1.99 for students with a diagnosis of primary headache disorder. Gender was nearly equally distributed among the total sample (male 47.5% versus female 52.5%) and among students of primary headache disorder (male 51% versus female 49%, P b .20). One-year prevalence of headache was 31.2% with no significant difference among females compared to males (15.3% versus 16%; P b .14). Prevalence of migraine was significantly higher (19.6%) followed by TTH (8.6%), chronic headache (1.3%) and medication-use headache (0.7%) (b0.001). Conclusions Primary headache prevalence is high among primary and middle school students. Migraine was the most prevalent headache. No significant difference was noted among those age group.