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Table 1 Demographic and baseline characteristics of study population

From: Non-invasive vagus nerve stimulation for acute treatment of high-frequency and chronic migraine: an open-label study

 

All

HFEM

CM

N = 50

n = 14

n = 36

Mean (SD) age, y

43.2 (11.3)

43.2 (12.3)

43.3 (10.8)

Female, n (%)

40 (80)

11 (78.6)

29 (80.5)

Mean (SD) disease duration, y

29.7 (11.2)

30.4 (13.5)

29.5 (10.2)

Mean (SD) number of migraine days per month

15.4 (5.6)

7.9 (2.3)

18.3 (3.3)

Allodyniaa, n (%)

18 (36)

4 (28.6)

14 (38.9)

Concomitant prophylaxis, n (%)

39 (78)

10 (71.4)

29 (80.6)

Migraine Type, n (%)

Migraine without aura

14 (28)

14 (100)

0

Medication overuse headache

5 (10)

0

5 (13.9)

Chronic migraine

36 (72)

0

36 (100)

Migraine Pain Location, n (%)

Unilateral

28 (56)

10 (71.4)

18 (50)

Bilateral

18 (36)

3 (21.4)

15 (41.7)

Unilateral/bilateral

4 (8)

1 (7.2)

3 (8.3)

Duration of Migraine Attacks, n (%)

≤24 h

17 (34)

5 (35.7)

12 (33.3)

25-48 h

8 (16)

2 (14.3)

6 (16.7)

>48 h

25 (50)

7 (50)

18 (50)

  1. CM chronic migraine, HFEM high-frequency episodic migraine; SD standard deviation
  2. aAllodynia was assessed using the Allodynia Symptom Checklist