Table I. Risk factors for developing FSE compared with simple FS.

Factor	FSE N (%)	Simple FS N (%)	Univariate OR (95% CI)	Multivariate OR (95% CI)
Age
<18 mo	107 (63.3%)	40 (39.2%)	2.7 (1.6, 4.4)	2.8 (1.47, 5.43)
≥18 mo	62 (36.7%)	62 (60.8%)	1.0 (Referent)	1.0 (Referent)
Daycare attendance
Daycare	32 (19.5%)	15 (15.3%)	1.3 (0.7, 2.6)
No daycare	132 (80.5%)	83 (84.7%)	1.0 (Referent)
Drinking during pregnancy
At least 1 drink in pregnancy	10 (6.3%)	1 (1.0%)	6.5 (0.8, 51.7)
No drink in pregnancy	149 (93.7%)	97 (99.0%)	1.0 (Referent)
First-degree family history of FS
Positive family history	42 (25.0%)	20 (20.2%)	1.3 (0.7, 2.4)	3.0 (1.28, 6.88)
No family history	126 (75.0%)	79 (79.8%)	1.0 (Referent)	1.0 (Referent)
First-degree family history of epilepsy
Positive family history	22 (13.1%)	8 (8.1%)	1.7 (0.7, 4.0)
No family history Cpv	146 (86.9%)	91 (91.9%)	1.0 (Referent)
Sex
Female	87 (51.5%)	43 (42.2%)	1.5 (0.9, 2.4)	2.2 (1.14, 4.43)
Male	82 (48.5%)	59 (57.8%)	1.0 (Referent)	1.0 (Referent)
Premature birth
≤ 37 wk	46 (29.1%)	15 (15.5%)	2.2 (1.2, 4.3)	1.8 (0.82, 3.90)
>37 wk	112 (70.9%)	82 (84.5%)	1.0 (Referent)	1.0 (Referent)
Smoking during pregnancy
No	139 (82.2%)	94 (94.0%)	1.0 (Referent)	1.0 (Referent)
Yes	30 (17.8%)	6 (6.0%)	3.4 (1.4, 8.4)	2.4 (0.77, 7.77)
Any temporal lobe abnormality other   than increased T2 signal
Abnormal	21 (13.0%)	3 (3.1%)	4.6 (1.3,16.0)	4.6 (1.17,18.33)
No abnormality	140 (87.0%)	93 (96.9%)	1.0 (Referent)	1.0 (Referent)
Any structural abnormality on MRI
Abnormal	60 (37.3%)	34 (35.4%)	1.1 (0.6, 1.8)
No abnormality	101 (62.7%)	62 (64.6%)	1.0 (Referent)
Temperature
<104.0°F	136 (81.0%)	57 (55.9%)	3.4 (1.9, 5.8)	3.7 (1.80, 7.50)
≥104.0°F	32 (19.0%)	45 (44.1%)	1.0 (Referent)	1.0 (Referent)
Time temperature was recognized before seizure
1-24 h	139 (82.2%)	53 (53.0%)	2.2 (1.2, 4.2)	2.4 (1.10, 5.33)
<1 h	28 (16.6%)	24 (24.0%)	1.0 (Referent)	1.0 (Referent)
>24 h	2 (1.2%)	23 (23.0%)	0.1 (0.0, 0.3)	0.1 (0.01,0.56)