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Table 5 Internal consistency and Item-total correlation of the twelve Factors

From: Work-related complaints of arm, neck and shoulder among computer office workers in an Asian country: prevalence and validation of a risk-factor questionnaire

Domain Factors Internal consistency (Cronbach's alpha) Item-total correlation (Min-Max) Items numbers
Work Station Factor 1: Work area 0.46 0.18 to 0.39 9,10,15
  Factor 2: Computer position 0.43 0.14 to 0.37 11,13,14
Body Posture Factor 3: Incorrect body posture 0.74 0.27 to 0.68 23,24,25,26
  Factor 4: Bad habits 0.76 0.45 to 0.66 17,18,19,20,21
Job Control Factor 5: Skills and abilities 0.82 0.53 to 0.74 32,33,34,35
  Factor 6: Decision making 0.60 0.26 to 0.49 27,28,29,30
Job Demands Factor 7: Time management 0.82 0.61 to 0.72 36,37,38,39
  Factor 8: Work overload 0.65 0.30 to 0.57 40.41.42
Break Time Factor 9: Work breaks 0.80 0.61 to 0.70 43,44,45
  Factor 10: Variation in work 0.60 0.29 to 0.46 47,48,49
Social Support Factor 11: Work environment 0.73 0.47 to 0.63 51, 52, 54
  Factor 12: Social support 0.68 0.34 to 0.63 55,56,57