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