Table 7

Item-total correlation of the twelve Factors

Domain
Factors
Item-total correlation
(Min-Max)
Items numbers

Work Station
Factor 1: Office equipment
0.23 to 0.35
13.17.18.20

Factor 2: Computer position
0.36
16.19
Body Posture
Factor 3: Head and body posture
0.57 to 0.90
25.26.27.28. 29.30

Factor 4: Awkward body posture
0.40 to 0.96
21. 22. 24. 32
Break Time
Factor 5: Autonomy
0.23 to 0.47
50.51.54.55

Factor 6: Break quality
0.43 to 0.62
47.48.52.53.56
Job Control
Factor 7: Skill discretion
0.41 to 0.72
31.32.33.34.36

Factor 8: Decision authority
0.44 to 0.53
35.38.39
Job Demands
Factor 9: Time pressure
0.12 to 0.30
41.42.45.

Factor 10: Task complexity
0.49 to 0.56
40.43.46
Social Support
Factor 11:Social support
0.85 to 0.88
70.71.72.73.74.75.76

Factor 12: Work flow
0.71 to 0.97
65.66.67.68.69

Eltayeb et al. Environmental Health 2008 7:33   doi:10.1186/1476-069X-7-33