Table 1:

Demographic and Epilepsy Characteristics of Study Population by Research Opt-in Status

	All Subjects (N=199)	Opt-in (N=154)	Opt-out (N=45)	P-value*
Age (yrs) (mean SD)	42.9 ± 15.5	42.1 ± 15.9	45.8 ± 13.5	0.16
Female	114 (57.3%)	89 (57.8%)	25 (55.6%)	0.79
Race				0.91
White or Caucasian	169 (84.9%)	130 (84.4%)	39 (86.7%)
Black or African American	24 (12.1%)	19 (12.3%)	5 (11.1%)
Other	6 (3.0%)	5 (3.2%)	1 (2.2%)
Hispanic/Latino	6 (3.0%)	4 (2.6%)	2 (4.4%)	0.52
Primary insurance type				0.19
Private/commercial	80 (40.2%)	63 (40.9%)	17 (37.8%)
Medicaid	38 (19.1%)	34 (22.1%)	4 (8.9%)
Medicare	60 (30.2%)	41 (26.6%)	19 (42.2%)
None	17 (8.5%)	13 (8.4%)	4 (8.9%)
Other	4 (2.0%)	3 (1.9%)	1 (2.2%)
Leading diagnosis of epilepsy				0.36
Yes	170 (85.4%)	129 (83.8%)	41 (91.1%)
No	20 (10.1%)	18 (11.7%)	2 (4.4%)
Uncertain	9 (4.5%)	7 (4.5%)	2 (4.4%)
Epilepsy type among N=170 with epilepsy	N=170	N=129	N=41	0.08
Focal	127 (74.7%)	91 (70.5%)	36 (87.8%)
Generalized	30 (17.6%)	26 (20.2%)	4 (9.8%)
Unknown	13 (7.6%)	12 (9.3%)	1 (2.4%)
Diagnosis of psychogenic nonepileptic seizures				0.13
Yes: clinically established or documented	7 (3.5%)	7 (4.5%)	0 (0.0%)
Uncertain: includes possible or probable	13 (6.5%)	12 (7.8%)	1 (2.2%)
No	179 (89.9%)	135 (87.7%)	44 (97.8%)
Seizure free 6 months among N=170 with epilepsy	N=170	N=129	N=41	0.27
Yes	66 (38.8%)	48 (37.2%)	18 (43.9%)
No	97 (57.1%)	74 (57.4%)	23 (56.1%)
Uncertain	7 (4.1%)	7 (5.4%)	0 (0.0%)

^*two sample t-test or chi square test

chi square p value shown at top of category label for categorical variables having more than 2 categories