Table 2.
Descriptive statistics of conditioned pain modulation-related parameters (mean and SD).
| Parameter | Painful DPN | Nonpainful DPN |
|---|---|---|
| PPT Ts stand-alone (kg/cm2) | 4.6 ± 1.8 | 5.0 ± 1.8 |
| PPT Ts conditioned (kg/cm2) | 5.3 ± 2.1 | 5.8 ± 2.2 |
| Pain50 Ts temperature (°C) | 45.8 ± 2.6 | 46.0 ± 2.8 |
| Heat Ts stand-alone (NPS) | 52.7 ± 15.4 | 54.2 ± 15.2 |
| Heat Ts conditioned (NPS) | 43.9 ± 19.6 | 49.1 ± 19.9 |
| Cs (NPS) | 47.7 ± 26.6 | 44.3 ± 25.3 |
CPM, conditioned pain modulation; Cs, conditioning stimulus; DPN, diabetic polyneuropathy; Heat Ts, tonic heat stimulus; NPS, numerical pain scale; Pain50 Ts, pain 50 tonic stimulus; PPT Ts, pressure pain threshold test stimulus.