Electrodiagnosis: comparison between patients with CIAP, patients with PAD, and controls
| CIAP (n=23) | PAD (n=42) | Controls (n=48) | CIAP v controls | PAD v controls | CIAP v PAD | |
|---|---|---|---|---|---|---|
| Values are mean (SD). | ||||||
| CIAP, Chronic idiopathic axonal polyneuropathy; PAD, peripheral arterial disease; NR, no response obtainable; DML, distal motor latency; MCV, motor conduction velocity; SCV, sensory conduction velocity; SNAP, sensory nerve action potential; CMAP, compound muscle action potential. | ||||||
| Median nerve, motor | ||||||
| DML (ms) | 4.4 (0.7) | 3.8 (0.5) | 3.7 (0.4) | p<0.001 | NS | p<0.01 |
| MCV lower arm (m/s) | 50 (4.6) | 55 (4.0) | 57 (4.2) | p<0.001 | p<0.01 | p<0.001 |
| MCV upper arm (m/s) | 55 (8.9) | 60 (6.7) | 62 (5.1) | p<0.001 | NS | p<0.05 |
| CMAP amplitude wrist (mV) | 8.3 (2.8) | 9.7 (4.1) | 10.7 (2.9) | p<0.01 | NS | NS |
| Minimal F-M latency (ms) | 27.1 (2.8) | 25.0 (2.1) | 23.7 (2.0) | p<0.001 | p<0.01 | p<0.01 |
| Median nerve, sensory | ||||||
| SCV hand (m/s) | 46 (5.4) | 52 (6.1) | 54 (5.0) | p<0.001 | NS | p<0.01 |
| SCV lower arm (m/s) | 49 (6.5) | 57 (4.1) | 58 (4.1) | p<0.001 | NS | p<0.001 |
| SNAP amplitude wrist (uV) | 7.9 (6.8) | 13.8 (7.9) | 16.1 (7.7) | p<0.001 | NS | p<0.01 |
| Tibial nerve | ||||||
| DML (ms) | 4.8 (0.8) | 4.3 (0.9) | 4.0 (0.4) | p<0.001 | NS | p<0.01 |
| MCV (m/s) | 37 (4.7) | 43 (5.3) | 45 (4.0) | p<0.001 | p<0.05 | p<0.001 |
| CMAP amplitude ankle (mV) | 1.8 (2.3) | 7.0 (5.1) | 8.0 (3.5) | p<0.001 | NS | p<0.001 |
| Minimal F-M latency (ms) | 58.7 (7.2) | 49.6 (6.3) | 48.6 (5.1) | p<0.001 | NS | p<0.001 |
| NR=22% | NR=0% | NR=0% | ||||
| Sural nerve | ||||||
| SCV (m/s) | 46 (2.9) | 47 (5.3) | 49 (5.1) | NS | NS | NS |
| SNAP amplitude (uV) | 3.8 (1.8) | 9.3 (6.6) | 11.8 (6.0) | p<0.001 | p<0.05 | p<0.01 |
| NR=52% | NR=7% | NR=2% | ||||
| Electromyography anterior tibial muscle | ||||||
| Spontaneous activity | 65 | 12 | 2 | p<0.001 | NS | p<0.001 |