Quantitative sensory testing, heart rate, and nerve conduction study data
| Group mean N=36 | DSP(−) | DSP(+) | p Value | |
|---|---|---|---|---|
| Quantitative sensory testing | ||||
| VPT hand (volts) | 4.5±2.7 | 2.9±1.3 | 5.3±2.9 | 0.01 |
| VPT toe (volts) | 17.3±12.4 | 7.0±3.9 | 16.8±15.6 | <0.001 |
| Cooling detection threshold (°C) | 23.8±7.4 | 28.8±3.1 | 23.0±6.6 | 0.001 |
| LDIFLARE area (cm2) | 1.9±0.7 | 2.0±1.4 | 1.8±0.5 | 0.2 |
| Heart rate | ||||
| Resting heart rate (bpm) | 62±7 | 60±10 | 62±12 | 0.4 |
| Resting heart rate, deep breathing (bpm) | 62±8 | 60±7 | 61±9 | 0.4 |
| HRV normal breathing (%) | 15±10 | 24±20 | 11±9 | 0.03 |
| HRV deep breathing (%) | 24±16 | 28±34 | 18±18 | 0.03 |
| Nerve conduction study | ||||
| Sural nerve amplitude (μv) | 2.7±9.1 | 13.0±9.8 | 1.9±2.3 | <0.001 |
| Sural nerve conduction velocity (m/s) | 43.8±11.0 | 48.3±7.6 | 39.6±11.3 | <0.001 |
| Peroneal nerve amplitude, ankle (mV) | 3.2±4.6 | 5.8±2.9 | 1.6±3.0 | <0.001 |
| Peroneal nerve conduction velocity, fibular head (m/s) | 38.8±6.6 | 45.0±3.6 | 36.2±5.8 | <0.001 |
| Peroneal nerve F-wave (ms) | 55.5±18.3 | 48.6±5.1 | 57.8±19.2 | <0.001 |
HRV, heart rate variability, LDIFLARE, laser Doppler imaging flare; VPT, vibration perception threshold.