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Table 4 CNV data for all groups at pre, post and follow-up measurement

From: Progressive muscle relaxation reduces migraine frequency and normalizes amplitudes of contingent negative variation (CNV)

  Pre-treatment amplitude in μV (SD) Post-treatment amplitude in μV (SD) Follow-up amplitude in μV (SD)
iCNV Migraine + PMR −11.46 (4.79) −8.68 (3.54) −8.5 (4.88)
− PMR −11.81 (6.4) −11.22 (4.85) −11.19 (5.1)
Healthy + PMR −8.19 (3.25) −8.66 (4.35) −8.72 (3.58)
− PMR −8.97 (5.18) −7.76 (5.13) −7.24 (5.64)
oCNV Migraine + PMR −8.58 (2.26) −6.59 (1.93) −6.28 (2.41)
− PMR −8.72 (3) −7.08 (2.07) −6.71 (2.55)
Healthy + PMR −6.3 (2.23) −5.61 (4) −6.3 (2.57)
− PMR −7.04 (2.73) −5.6 (2.74) −5.72 (3.72)
Habituation coefficient Migraine + PMR 0.20 (1.28) −0.31 (0.94) 0.31 (0.58)
− PMR −0.26 (0.87) −0.18 (0.93) 0.10 (0.87)
Healthy + PMR −0.03 (1.23) 0.21 (0.85) 0.08 (0.81)
− PMR 0.26 (1.01) −0.01 (0.83) −0.14 (0.82)
  1. μV microvolt, SD standard deviation