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Table 1 Baseline characteristics of CM patients

From: Neurophysiological correlates of clinical improvement after greater occipital nerve (GON) block in chronic migraine: relevance for chronic migraine pathophysiology

Parameters

Patients

Healthy volunteers

p-value

Age

32.9 ± 14.5

31.45 ± 13.94

p = 0.63

Gender

17 F

19 F

–

N° of headache days per month

24.88 ± 7.22

–

–

Medication Overuse Headache

12 (70%)

–

–

Type of medication overused

 

–

–

Triptans: 4 (33%)

  

NSAIDs: 7 (58%)

  

Combination: 1 (8%)

  

N° of acute medication per month

16.18 ± 12.31

–

–

Pain intensity (1–3 scale)

1point 0 pts

  

2 points 3 pts

–

–

3 points 15 pts

  

Habituation N1P1 at T0

0.23 ± 0.68

0.26 ± 0.63

p = 0.53

Habituation P1N2 at baseline

0.20 ± 0.55

0.08 ± 0.53

p = 0.54

IDAP at baseline

0.76 ± 0.95

0.03 ± 0.76

p = 0.01*

  1. The star (*) indicates the p level after post-hoc comparison, when appropriate. Otherwise, p level indicated refers to the one obtained by the repeated measures model