Table 1 Baseline characteristics

Participants (females)

40 (30)

40(26)

40 (30)

Age in years, mean (sd)

45.4 (10.7)

44.7 (9.3)

42.5 (9.4)

Number reporting ≥ 1 headache event/day in the last 4 weeks (%)

31 (77.5)

29 (72.5)

28 (70)

Number reporting ≥ 1neck pain event/day in the last 4 weeks (%)

33 (82.5)

27 (67.5)

35 (87.5)

Number of headache days in the last 4 weeks, mean (sd)

(n = 88)

3.88 (6.08)

(n = 31)

3.49 (4.70)

(n = 29)

3.38 (3.48)

(n = 28)

Number of neck pain days in the last 4 weeks, mean (sd)

(n = 95)

6.58 (7.64)

(n = 33)

6.48 (8.41)

(n = 27)

7.29 (8.05)

(n = 35)

Average headache intensity (0–10), mean (sd)

(n = 88)

4.15 (1.99)

(n = 31)

4.56 (2.41)

(n = 29)

4.26 (2.08)

(n = 28)

Average neck pain intensity (0–10), mean (sd)

(n = 95)

3.13 (1.92)

(n = 33)

2.88 (1.86)

2.93 (1.64)

HIT-6 score (36 to 78 points)

(n = 88)

52.6 (7.1)

(n = 31)

54.0 (9.5)

(n = 29)

54.3 (7.1)

(n = 28)

NDI score (0–50 points)

(n = 95)

6.3 (4.9)

(n = 33)

5.7 (5.9)

(n = 27)

5.5 (4.0)

(n = 35)

Work-related variables

Level of employment

< 50–100%, median (range)

80–89% (< 50 to 100%)

90–99% (50–59 to 100%)

100% (50–59 to 100%)

Time of employment

(< 1 year to > 10 years), median (range)

6–10 years (< 1 to > 10 years)

3–5 years (< 1 to > 10 years)

3–5 years (< 1 to > 10 years)

Working with people in one room (1–2 to > 7 people), median, range

3–6 people (1–2 to > 7 people)

1–2 people (1–2 to > 7 people)

3–6 people (1–2 to > 7 people)

Average working time at the computer during working day in hours, median (range)

6–8 h (4–6 to > 8 h)

6–8 h (4–6 to > 8 h)

6–8 h (4–6 to > 8 h)

Self-perceived work performance (0 = worst to 10 = best possible), median (range)

9 (7 to 10)

9 (5 to 10)

8 (6 to 10)

Job stress index (JSI) category Total (n):

 N = 40

 N = 40

 N = 40

More resources(n):

 14

 20

 16

Balanced (n):

 20

 15

 19

More stressors(n):

6

5

5