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Table 1 Demographic data of the patients

From: Long-term outcomes and prognosis factors of vagus nerve stimulation in patients with refractory epilepsy

 

Overall group (n=76)

Responsive patients (n=52)

Non-responsive patients (n=24)

P-value

Male

53 (69.7%)

36 (69.2%)

17 (70.8%)

0.888

Age at onset, years (mean±SD)

8.51±6.92

9.53±7.61

6.25±4.46

0.052

Age at surgery, years (mean±SD)

21.40±9.09

22.21±9.71

19.63±7.46

0.252

Mean epilepsy duration, years (mean±SD)

13.12±7.86

13.00±8.55

13.38±6.24

0.831

Pre-operative seizure frequency/month (range)

13 (5-60)

11 (5-62)

37 (5-60)

0.580

Predominant seizure type

 GTCS

12 (15.8%)

9 (17.3%)

3 (12.5%)

 

 Atypical absence

12 (15.8%)

5 (9.6%)

7 (29.2%)

 

 Spasm

10 (13.2%)

6 (11.5%)

4 (16.7%)

 

 Tonic seizure

2 (2.6%)

2 (3.8%)

0

0.026

 Myoclonic seizure

5 (6.6%)

4 (7.7%)

1 (4.2%)

 

 Partial seizure

33 (43.4%)

25 (48.1%)

8 (33.3%)

 

 Others

2 (2.6%)

1 (1.9%)

1 (4.2%)

 

MRI lesions

   

0.639

 Positive

35 (46.1%)

23 (44.2%)

12 (50.0%)

 

 Negative

41 (53.9%)

29 (38.2%)

12 (50.0%)

 

History of surgical treatment

   

0.531

 Yes

23 (30.3%)

14 (26.9%)

9 (37.5%)

 

 No

53 (69.7%)

38 (73.1%)

15 (62.5%)

 
  1. GTCS Generalized tonic-clonic seizure