Table 1 Demographic and clinical characteristics of the participants

Gender

Male

58 (81.7 %)

Female

13 (18.3 %)

Age

Mean (Range, SD)

39.0 (23–57, 8.0)

Job category

Sales/Marketing

25 (35.2 %)

Production/Factory

12 (16.9 %)

Engineering/Technical

18 (25.4 %)

Administration/Management

15 (21.1 %)

Unkown

1 (1.4 %)

Job rank

Supervisory

18 (25.4 %)

Nonsupervisory

53 (74.6 %)

K6 score

Mean at baseline (Range, SD)

9.8 (5–18, 3.4)

Enthusiasm

Mean of Q1 at baseline (Range, SD)

7.0 (1–10, 2.2)

Mean of Q2 at baseline (Range, SD)

7.6 (0–10, 2.0)