Table 3.
Pain-related evoked potential parameters
| Left PREP | Right PREP | |||||
|---|---|---|---|---|---|---|
| N1 latency (ms) | P1 latency (ms) | PPA (μ) | N1 latency (ms) | P1 latency (ms) | PPA (μ) | |
| EM | 122.62 ± 9.71** | 169.82 ± 9.70** | 63.76 ± 13.22 | 121.37 ± 10.09** | 169.56 ± 10.61** | 63.75 ± 13.35** |
| CM | 125.25 ± 8.71* | 172.83 ± 10.43* | 61.05 ± 15.65 | 125.95 ± 8.46 | 172.47 ± 10.43* | 59.13 ± 15.74* |
| Controls | 130.71 ± 6.84 | 179.10 ± 8.50 | 59.48 ± 14.25 | 130.14 ± 6.94 | 178.59 ± 8.05** | 54.63 ± 13.91 |
*p < 0.05 between CM and controls; **p < 0.05 between EM and controls; there are no statistical differences between CM and EM for PREP parameters. P-values were determined using the Mann–Whitney U test. All values are expressed as means and standard deviations
EM episodic migraine, CM chronic migraine, PREP pain-related evoked potential, PPA peak-to-peak amplitude, AUC area under the curve