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Table 5 Parameters in each category used in the expanded model predictions of range of amplitude of trapezius muscle activity and range of motion of shoulder, head, neck, and torso postures

From: Prediction of trapezius muscle activity and shoulder, head, neck, and torso postures during computer use: results of a field study

Range of Amplitude/Range of Motion Individual factors (Total = 15) Job characteristics (Total = 12) Computer work behaviors (Total = 20) Psychosocial factors (Total = 17) Workstation setup (Total = 27) Health and pain (Total = 6) Leisure time activities (Total = 6) Key (p-values) Mouse (p-values) Idle (p-values) Total number of predictors
Shoulder EMG (%MVC)            
Right Trapezius1 10,16 17,25 41 53,59 72       8
Left Trapezius 11 17 29,43 64 69,72,78 98      9
Shoulder Posture (degrees)            
Right Abduction 4,12 18 44   69,72,77,87 97      9
Left Abduction 2,9,10,11     69,75,82 93 102     9
Right Flexion 4 21 32 51,62,65 80 93 99,103     10
Left Flexion    29,32,41,43 50,51 69 93 104     9
Right Internal Rotation   24 35 58 72,82,89 95      7
Left Internal Rotation 16 24 41,46 53 72,75,86   103 0.03    9
Head Posture (degrees)            
Tilt   19,21,28 47 51,62 83 98 102,104   0.03   10
Flexion 4 18 29,36,41 51 83,92       8
Neck Posture (degrees)            
Tilt 4 23,26    74,83   101     6
Flexion 4   29,31 62 70,75 97 100,101,104     10
Torso Posture (degrees)            
Tilt 10 24,28 46   70,74,78   102,104 0.03    9
Flexion 3,4,9 18   62 75       6
  1. Numbers in each category correspond to the numbers assigned to each parameter described in Appendix A.