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Table 3 Mean and standard deviation (SD) for the N2 wave latencies of contact heat evoked potentials of the volar forearm and pooled cheek of migraine patients and healthy controls for trains without and with performing the calculation task

From: Contact heat evoked potentials and habituation measured interictally in migraineurs

N2 wave latencies (ms)
  Migraine patients Healthy controls p values (power) Mann–Whitney-U
Without performing the calculation task Volar forearm (mean ± SD) Pooled cheek (mean ± SD) Volar forearm (mean ± SD) Pooled cheek (mean ± SD) Volar forearm Pooled cheek Volar forearm Pooled cheek
Train 1 419.90 ± 34.79 333.66 ± 36.15 394.57 ± 23.19 318.95 ± 36.97 0.013 (0.81) 0.122 (0.46) 121.5 669.5
Train 2 416.46 ± 38.53 334.60 ± 32.81 393.32 ± 22.69 313.02 ± 41.76 0.023 (0.69) 0.016 (0.77) 130.0 627.5
With performing the calculation task
Train 1 400.69 ± 34.17 329.56 ± 42.40 365.76 ± 47.11 310.13 ± 39.18 0.046 (0.80) 0.087 (0.60) 98.5 465.0
Train 2 390.92 ± 37.03 325.16 ± 32.18 353.54 ± 48.95 304.61 ± 43.33 0.015 (0.29) 0.045 (0.71) 74.0 321.0
  1. Statistical comparison with Mann–Whitney-U test (migraine patients vs. healthy controls), p < 0.05 is considered to be significant.