Table 1 Characteristics of the participants (n = number of participants; f = female; m = mean; SD = standard deviation)

Sex f (n (%))

38 (61)

33 (66)

Age (m (SD))

41.94 (16.27)

42.78 (12.41)

Headache and / or neck pain (n (%))

39 (62.90)

–

Headache

–

30 (60)

Neck pain

–

38 (76)

 1 (1–8 points) mild symptoms

13 (20.97)

12 (29.27)

 2 (9–39 points) moderate symptoms

26 (41.94)

27 (65.85)

 3 (40–100 points) severe symptoms

0 (0)

2 (4.88)

 1 little impairment

22 (35.48)

11 (35.48)

 2 minor impairment

6 (9.68)

6 (19.35)

 3 moderate impairment

4 (6.45)

8 (25.81)

 4 severe impairment

7 (11.29)

6 (19.35)