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Table 3 Summary of various prognosticators and development of treatment failure (BNI IV-V)

From: Refractory trigeminal neuralgia treatment outcomes following CyberKnife radiosurgery

Variable

Good outcome

Treatment failure

P-value

No of patients

18 (72%)

7 (28%)

0.05

Gender

   

Male

10

3

0.51

Female

8

4

 

Age

   

≥70 years

7

3

0.81

<70 years

11

4

 

Diabetes

  

0.05

Yes

2

3

 

No

16

4

 

Multiple Sclerosis

  

0.88

Yes

3

1

 

No

14

6

 

Side of Pain

   

Right

9

5

0.38

Left

9

2

 

Duration of

   

Symptoms

   

>8 years

12

4

0.74

<8 years

6

3

 

Dose

   

60 Gy

14

5

0.68

>60 Gy

4

2

 

New Bothersome

  

0.20

Facial Numbness

4

7

 

Yes

14

0

 

No

   

Post-treatment BNI

   

Facial Numbness

   

I-II

10

7

0.04

III-IV

8

0

 

Prior Surgery

   

Yes

13

4

0.40

No

5

3