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Table 1 Characteristics of the 11 patients before implantation

From: Safety and efficacy of deep brain stimulation in refractory cluster headache: a randomized placebo-controlled double-blind trial followed by a 1-year open extension

Center/patient no.

Group

Sex

Age (years)

Disease duration (years)

Attack side

Onset clinical form

Attacks/week

Pain intensity

Sumatriptan injection/week

Oxygen use

C1/P1

On/Off

M

52

35

Left

Episodic

14

9

1

No

C1/P2

Off/On

M

40

12

Right

Chronic

14

5

14

No

C1/P3

Off/On

M

51

8

Left

Episodic

19

2

15

No

C1/P4

On/Off

M

44

10

Left

Chronic

28

10

0

No

C1/P5

On/Off

M

47

7

Right

Chronic

11

6

11

No

C2/P1

Off/On

M

50

20

Right

Episodic

20

5

0

No

C2/P2

Off/On

F

42

3

Left

Chronic

7

8

1

Yes

C3/P1

On/Off

F

42

7

Right

Episodic

53

6.5

0

Yes

C3/P2

Off/On

M

36

7

Left

Chronic

9

5

11

No

C4/P1

Off/On

M

39

18

Right

Episodic

14

5

14

No

C4/P2

On/Off

F

43

6

Right

Chronic

7

7

1

Yes

Mean

  

44.1

12.1

  

17.8

6.1

6.2

 
  1. Some patients did not use attack treatment by sumatriptan and/or oxygen due to their lack of efficacy or side effects (such patients used opioids with weak efficacy)