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Underlying disorders associated with the symptomatic or cryptogenic seizure episodes
| Cause | Number (%) |
|---|---|
| Developmental delay | 5 (5.4) |
| Mental retardation | 4 (4.3) |
| Metabolic disease | 1 (1.1) |
| Structural abnormality of the brain | 3 (3.3) |
| Others | 6 (6.5) |
