- Parental age and epilepsy in GDD patients:
| Parameters | Epilepsy | Epilepsy free |
|---|---|---|
| Maternal age | ||
| 20-30 years | 44 | 42 |
| 30-40 years | 42 | 36 |
| Above 40 years | 24 | 7 |
| Total | 110 | 85 |
| P-value | p=0.144 | |
| Paternal age | ||
| 20-30 years | 5 | 6 |
| 30-40 years | 40 | 48 |
| Above 40 years | 46 | 18 |
| Above 40 years | 91 | 72 |
| P-value | p=0.003 |