Table 2. Electrophysiological test results.
| ID | age | summary | f-wave-latency and persistence | motor NCV, latency, and MSAP | sensory NCV and SNAP | SSEP latency and amplitude | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| right peroneal | right tibial | right peroneal | right tibial | right sural | right tibial | left tibial | ||||||||||||
| (ms) | % | (ms) | % | (m/s) | (ms) | (uV) | (m/s) | (ms) | (uV) | (m/s) | (μV) | P40 (ms) | N35-P40 (μV) | P40 (ms) | N35-P40 (μV) | |||
| 1 | 67 | axonal sensory polyneuropathy | 51.7 | 67 | 51.8 | 100 | 40 | 4.3 | 6 | 43 | 5 | 16 | n.p. | 58.0 | 0.5 | 60.0 | 0.6 | |
| 2 | 62 | possible sensory axonal polyneuropathy | 46.1 | 30 | 44.2 | 100 | 44 | 3.6 | 7.6 | 51 | 4 | 19 | 48 | 13 | 43.8 | 0.7 | 38.9 | 0.9 |
| 3 | 77 | demyelinating sensory polyneuropathy of unclear origin | 47.0 | >90 | 44.0 | >90 | 49 | 4.6 | 6 | 43 | 4.1 | 16 | 29 | 7 | 44.2 | 1.9 | 49.1 | 1.5 |
| 4 | 57 | minor axonal sensory-motor polyneuropathy | 53.0 | >90 | 53.0 | >90 | 43 | 4.1 | 4.7 | n.p. | 4.7 | 21 | 46 | 2 | 44.4 | 0.6 | 43.4 | 0.4 |
| 5 | 61 | no signs of polyneuropathy | 52.8 | >90 | 53.4 | 54 | 49 | 6.0 | 3.7 | 43 | 5 | 15 | 43 | 20 | 41.4 | 0.7 | 43.1 | 0.5 |
| 6 | 58 | minor axonal mainly sensory polyneuropathy | n.p. | 48.0 | 100 | 45 | 3.8 | 5.6 | 51 | 3.4 | 23 | 41 | 6 | n.p. | ||||
| 7 | 47 | minor axonal-demyelinating sensory polyneuropathy | - | - | - | - | 44 | 4.3 | 12.5 | 47 | 4.6 | 16 | 33 | 10 | 41.4 | 0.2 | 43.9 | 0.5 |
| 8 | 64 | minor axonal sensory-motor polyneuropathy | 54.2 | >90 | 53.9 | >90 | 45 | 4.6 | 2.8 | 58 | 3.9 | 24 | 37 | 8 | 40.1 | 1.0 | 40.8 | 0.9 |
| 9 | 74 | axonal. mainly sensory polyneuropathy | n.p. | 55.0 | >90 | 38 | 4 | 3 | 41 | 4.7 | 7 | n.p. | 63.5 | 0.2 | 60.3 | 0.3 | ||
| 10 | 45 | possible. beginning sensory polyneuropathy | 44.4 | >90 | 43.4 | >90 | 48 | 4.9 | 11 | 54 | 5.1 | 27 | 36 | 21 | 37.8 | 2.0 | 39.2 | 2.3 |
| 11 | 53 | axonal sensory-motor polyneuropathy | n.p. | 57.0 | >90 | - | n.p. | - | 44 | 3.8 | 25 | 41 | 10 | 48.7 | 1.4 | 51.8 | 0.4 | |
| 12 | 59 | declined examination | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 13 | 47 | axonal-demyelinating sensory polyneuropathy | 49.4 | >90 | 51.3 | >90 | 47 | 4.8 | 5.4 | 44 | 3.9 | 29 | 30 | 5 | 56.7 | 1.3 | 56.7 | 2.0 |
| 14 | 52 | axonal sensory polyneuropathy | 59.0 | >90 | 56.0 | >90 | 42 | 4.4 | 5.3 | 46 | 5.3 | 13 | n.p. | n.p. | ||||
| 15 | 63 | declined examination | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 16 | 62 | minor f-wave abnormality. no certain sign of polyneuropathy | 49.8 | 50% | 51.0 | >90 | 48 | 3.9 | 8.6 | 44 | 4.0 | 21 | 44 | 12 | n.p. | |||
| 17 | 58 | declined examination | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 18 | 70 | no certain sign of polyneuropathy | 53.7 | >90 | 55.0 | >90 | 44 | 4.4 | 9 | 42 | 5.1 | 15 | 55 | 19 | 46.6 | 2.6 | 46.4 | 1.7 |
| 19 | 41 | minor sensory axonal polyneuropathy | 57.3 | >90 | 62.2 | >90 | 43 | 3.9 | 5 | 44 | 5.1 | 17 | 37 | 4 | 46.0 | 3.4 | 46.3 | 2.6 |
| 20 | 71 | sensory axonal polyneuropathy | 46.9 | >90 | 54.2 | >90 | 41 | 4.5 | 3.6 | 40 | 5.7 | 12 | 40 | 1 | 45.2 | 0.8 | 46.4 | 1.2 |
CMAP—compound motor action potential; dmL—distal motor latency; NCV—nerve conduction velocity; SNAP—sensory nerve action potential; SSEP—somatosensory evoked potential. n.p.—no reproducible potential. Patient 12, 15, and 17 declined to undergo the examination for fear of pain. Patient 7 interrupted the examination before F-wave diagnostics were determined.