TABLE 4.

Aetiological classification of epilepsy in ILAE‐1989 and 2017 in epilepsy

Etiology category	Children N = 256 (%)	Adults N = 227 (%)	Total N = 483 (%)	P‐value
1989 etiology
Symptomatic	196 (92.4)	173 (76.2)	369	<.001
Idiopathic	40 (18.9)	34 (18.18)	74 (18.6)	.860
Cryptogenic	20 (7.8)	20 (8.8)	40 (8.2)	.462
Total	256	227	483
2017 etiology
Infectious	111 (43.3)	104 (45.8)	215 (44.5)	.588
Structural	115 (44.9)	61 (26.9)	176 (36.4)	<.001
Undetermined			119 (24.6)
Total	256	227	483

Epilepsy aetiology identified by electroencephalography (EEG) findings, magnetic resonance imaging (MRI) findings, prenatal events, high parasite antibody titres for exposure to neuro‐infection, and previously identified risk factors and proximate causes of epilepsy. ³ , ¹⁹