From: Evaluation of F wave and split hand index in patients with amyotrophic lateral sclerosis
Parameter | Controls n = 22 | ALS patients n = 22 | P value |
---|---|---|---|
F min. latency (ms) | 25.37 ± 2.17 | 28.19 ± 1.53 | < 0.001 |
F mean latency (ms) | 26.95 ± 2.21 | 29.74 ± 2.24 | < 0.001 |
F max. latency (ms) | 28.18 ± 2.48 | 32.33 ± 2.39 | < 0.001 |
F chronodispersion (ms) | 2.8 ± 0.78 | 4.13 ± 1.75 | 0.002 |
F persistence (%) | 99.0 ± 1.93 | 85.42 ± 16.98 | < 0.001 |
F max. amplitude (μV) | 700.45 ± 187.98 | 673.85 ± 230.85 | 0.0267 |
F mean amplitude (μV) | 552.44 ± 156.44 | 475.47 ± 209.26 | 0.018 |
F median amplitude (μV) | 651.3 ± 176.35 | 507.46 ± 193.53 | 0.004 |
F wave duration (ms) | 9.41 ± 1.01 | 10.39 ± 1.28 | 0.001 |
FWCV (m/s) | 63.5 ± 3.74 | 57.08 ± 6.40 | < 0.001 |
Giant F wave (n) | 0.0 ± 0.0 | 1.5 ± 3.08 | 0.001 |
F/M Max AR (%) | 5.24 ± 1.08 | 8.11 ± 1.71 | < 0.001 |
F/M mean AR (%) | 4.18 ± 0.76 | 5.37 ± 2.11 | 0.034 |
F/M median AR (%) | 4.76 ± 0.65 | 7.33 ± 4.78 | 0.006 |
IRN (%) | 0.0 ± 0.0 | 6.87 ± 16.77 | < 0.001 |
IRF | 0.0 ± 0.0 | 4.659 ± 10.12 | < 0.001 |
CMAP amplitude (mV) | |||
 APB muscle | 11.9 ± 2.09 | 6.17 ± 2.27 | < 0.001 |
 ADM muscle | 12.52 ± 2.05 | 9.62 ± 1.67 | < 0.001 |
 FDI muscle | 9.97 ± 1.02 | 5.09 ± 0.95 | < 0.001 |
ABP/ADM amplitude ratio | 1.21 ± 0.33 | 1.03 ± 0.51 | 0.001 |
FDI/ADM amplitude ratio | 1.31 ± 0.49 | 1.29 ± 0.66 | 0.609 |
Split hand index | 15.35 ± 5.36 | 10.28 ± 6.82 | 0.004 |