Table 1:

Demographic and clinical features

Group	No of Patients (n)	Age Range; Mean Age ± SD (y)	Duration of Epilepsy; Mean ± SD (y)	History of Risk Factors (n)	Unilateral Ipsilateral Interictal EEG Abnormality (n)	Bilateral Interictal EEG Abnormality (n)
Women with right HS	12	19–47; 30.58 ± 9.78; aP = .89; bP = .94; dP = .73	1–38; 20.41 ± 10.69; bP = .98; dP = .47	FS: 9; FH: 4; trauma: 1; meningitis: 1; none: 2	12	None
Men with right HS	10	17–42; 30.9 ± 8.72; aP = .93; bP = .94; eP = .55	6–41; 20.55 ± 12.12; bP = .98; eP = .30	FS: 5; FH: 3; trauma: 2; none: 3	7	3
Women with left HS	12	23–37; 29.5 ± 4.21; aP = .81; cP = .20; dP = .73	16–28; 20.44 ± 5.10; cP = .13; dP = .47	FS: 7; FH: 4; trauma: 3; none: 4	11	1
Men with left HS	10	22–42; 32.7 ± 7.02; aP = .69; cP = .20; eP = .55	10–36; 25.60 ± 8.42; cP = .13; eP = .30	FS: 4; FH: 4; trauma: 5; perinatal insult: 2; none: 1	10	None

Note:—Lateralization of HS on MR imaging and electrophysiologic ictal findings, and unilateral or bilateral presence of interictal EEG abnormalities of the patients are summarized.

FH indicates family history, FS, febrile seizure.

^aP values for matched control participants.

^bP values for women with right HS and men with right HS.

^cP values for women with left HS and men with left HS.

^dP values for women with right HS and women with left HS.

^eP values for men with right HS and men with left HS.