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Table 1 Sample characteristics in patients with unprovoked seizure (n = 168)

From: The impact of white matter lesions on seizure recurrence after first epileptic seizures in the elderly: a prospective study

 

EPI (n = 15)

EWML (n = 60)

OWML (n = 93)

Characteristics

n

%

N

%

n

%

Sex

 Female

3

20.0

27

45.0

50

53.8

 Male

12

80.0

33

55.0

43

46.2

 Seizure recurrence reported*

9

64.3

13

30.2

11

18.0

 Diagnosis of epilepsy

15

100.0

57

95.0

63

67.7

 Antiseizure medication started

15

100.0

58

96.7

70

75.3

 Status epilepticus as first seizure

4

26.7

16

26.7

17

18.3

 Death during study-period

3

20.0

20

33.3

21

22.6

Neuroimaging

 MRI

5

33.3

44

73.3

70

75.3

 CT**

10

66.7

16

26.7

23

24.7

Potentially epileptogenic findings***

 Postischemic lesion

7

46.7

31

51.7

 Posthemorrhagic lesion

5

33.3

14

23.3

 Tumor/Metastasis

3

20.0

20

33.3

21

22.6

 Hippocampal sclerosis

1

6.7

31

51.7

 Cortical dysplasia

0

0.0

1

1.7

Cavernoma

1

6.7

0

0.0

EEG

 Epileptiform discharge

1

6.7

15

25.0

25

26.9

 No epileptiform findings

14

93.3

44

73.3

67

72.0

 No EEG

0

0.0

1

1.7

1

1.1

  1. EPI = only presumed epileptogenic lesions on neuroimaging, EWML presumed epileptogenic lesions and white matter lesions on neuroimaging, OWML = only white matter lesions on neuroimaging
  2. *EPI: n = 14, EWML: n = 43, OWML: n = 61, lost to follow-up: n = 50
  3. **CT was only assessed by patients without MRI
  4. ***In the EPI group two of 15 patients got two potentially epileptogenic findings and in the EWML group 12 of 60 patients got two potentially epileptogenic findings