Table 1 Summary of clinical characteristics of the patients
Patient characteristics (n = 23) | No. of patients (%) |
|---|---|
Age (year) | |
< 50 | 1 (4) |
50–70 | 15 (65) |
> 70 | 7 (30) |
Sex | |
Male | 9 (39) |
Female | 14 (61) |
Symptom duration (year) before MVD | |
< 2 | 10 (43) |
2–6 | 7 (31) |
> 6 | 6 (26) |
Carbamazepine | |
Effective | 21 (91) |
Ineffective | 2 (9) |
Previous failed surgery | |
No | 19 (82) |
Thermo- or glycerol-rhizotomy | 4 (17) |
GSK | 2 (8) |
Side | |
Left | 16 (70) |
Right | 7 (30) |
Topography | |
V2 | 7 (30) |
V3 | 2 (9) |
V1 + V2 | 1 (4) |
V2 + V3 | 10 (44) |
V1 + V2 + V3 | 3 (13) |
Extent | |
1 | 4 (10) |
2 | 21 (52) |
3 | 15 (38) |
Preoperative BNI score | |
IV | 1 (4) |
IV | 22 (96) |
Symptom characteristics | |
Typical | 20 (87) |
Atypical | 3 (13) |
Trigger point | |
Positive | 20 (87) |
Negative | 3 (13) |