Table 2.
Outcome at 24 months according to the seven-scale modified Barrow Neurological Insitute pain intensity score (BNI) and the corresponding neurosurgical outcome (n = 115)
| Score | Pain description | n (%) | Neurosurgical outcome |
|---|---|---|---|
| BNI I | Complete pain relief: No pain and no medication | 80 (70) | Excellent |
| BNI II | Partial pain relief: Occasional pain but no medication required | 12 (10) | Good |
| BNI III A | Partial pain relief: No pain but daily medication required | 3 (2) | Good |
| BNI III B | Partial pain relief: Occasional pain but adequately controlled with medication | 4 (3) | Good |
| BNI IV | Poor pain relief: reduced pain but not adequately controlled with medication | 2 (2) | Poor |
| BNI V A | No pain relief | 5 (4) | Failure |
| BNI V B | Aggravation of pain | 2 (2) | Failure |
| Subsequent neurosurgical treatment before 24 months follow-up | 7 (6) | Failure | |
| Total | 115 |
A clinically significant outcome = BNI I-BNI IIIB = Surgical outcome of both excellent and good