Table.

Clinical characteristics and hippocampal volume

Clinical features and hippocampal volume	Seizure free, n = 30	Not seizure free, n = 10	p Value
Age at MRI scan, years	31.4 ± 1.6	37.0 ± 4.2	0.23§
Sex, M/F	14/16	1/9	0.06║
Side of seizure onset, R/L	15/15	6/4	0.72║
Age at first seizure onset, years	12.3 ± 1.6	11.8 ± 4.3	0.92§
Duration of epilepsy, years	19.6 ± 1.8	25.0 ± 3.2	0.16§
Seizure frequency per month	9.0 ± 1.1	12.4 ± 3.9	0.43§
History of febrile seizures, %‡	40	20	0.44║
History of CNS infection, %‡	13	20	0.63║
Ipsilateral hippocampal volume†	1,348 ± 282 mm3	889 ± 305 mm3	<0.0009§
Contralateral hippocampal volume†	2,293 ± 454 mm3	1,470 ± 181 mm3	<0.00001§

Data are shown as mean ± SEM.

^†Data are shown as mean ± SD of the mean.

^‡Percent of total subjects.

^§Student’s t test.

^║Fisher exact test.

R = right; L = left.