Table 6.

Internal consistency of the twelve Factors

Domain	Factors	Internal consistency (Cronbach's alpha)	Items numbers
Work Station	Factor 1: Office equipment	0.50	13.17.18.20
	Factor 2: Computer position	0.48	16.19
Body Posture	Factor 3: Head and body posture	0.88	25.26.27.28. 29.30
	Factor 4: Awkward body posture	0.66	21. 22. 24. 32
Break Time	Factor 5: Autonomy	0.76	50.51.54.55
	Factor 6: Break quality	0.79	47.48.52.53.56
Job Control	Factor 7: Skill discretion	0.84	31.32.33.34.36.37
	Factor 8: Decision authority	0.76	35.38.39
Job Demands	Factor 9: Time pressure	0.71	41.42.45.
	Factor 10: Task complexity	0.53	40.43.46
Social Support	Factor 11: Social support	0.94	70.71.72.73.74.75.76
	Factor 12: Work flow	0.76	65.66.67.68.69