Correlations of initial JOA score, clinical features, and evoked potential data
| Initial JOA score | No. of patients | Mean (SD) | p Value* |
|---|---|---|---|
| *Two sample Student’s t test. | |||
| Total | 49 | 13.9 (4.4) | |
| Sex | |||
| Men | 32 | 13.3 (4.2) | 0.231 |
| Women | 17 | 14.9 (4.7) | |
| Age | |||
| ⩾55 years | 26 | 13.7 (4.5) | 0.783 |
| <55 years | 23 | 14.0 (4.4) | |
| Arm MEP | |||
| Normal | 6 | 17.7 (4.8) | 0.079 |
| Abnormal | 43 | 13.3 (4.1) | |
| Leg MEP | |||
| Normal | 23 | 14.8 (4.4) | 0.150 |
| Abnormal | 26 | 13.0 (4.3) | |
| Median SEP | |||
| Normal | 25 | 16.2 (3.6) | <0.001 |
| Abnormal | 24 | 11.5 (3.9) | |
| Tibial SEP | |||
| Normal | 26 | 15.4 (3.8) | 0.009 |
| Abnormal | 23 | 12.1 (4.4) | |