| Criteria | Number | Prevalence |
| *DNS ≥ 1 | 277 | 82.4 |
| Monofilament 10 g test | 66 | 19.6 |
| Alteration of vibration sense | 96 | 28.6 |
| DNS ≥ 1 and/or alteration vibration sense and/or alteration of tendons reflex and/or monofilament 10 g test | 298 | 88.7 |