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Table 3 Parameters in each category used in the expanded model predictions of median trapezius muscle activity and shoulder, head, neck, and torso posture

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

Median Individual factors (Total = 16) 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 16   30,37,41,46 56,64 71,87 93   <0.01    10
Left Trapezius 2,10 18,26 29,37 60,64 76,78 93 102     12
Shoulder Posture (degrees)            
Right Abduction 2   40 52,61,65 76,77,82,85 93      10
Left Abduction 4,11   33,38,43   72,82   102     8
Right Flexion     51,60,65    102     4
Left Flexion 2   45 67,81,85   93      6
Right Internal Rotation 16 20,22 33,45,46,47 53,58,55,63     0.05 < 0.01   11
Left Internal Rotation    30,45,46,48 52,64,65 84,92    <0.01   0.05 9
Head Posture (degrees)            
Tilt   22 43 59,61 78 98      6
Flexion   24 47 52 77,78,83,88,89 96    0.01   9
Neck Posture (degrees)            
Tilt   17 42,43 70,72,78,85        7
Flexion   17,21 29 55,59 67,72,81,89,90       10
Torso Posture (degrees)            
Tilt   24 29,35 64 66,78 98      7
Flexion    45 55,59 74,78,89       6
  1. Numbers in each category correspond to the numbers assigned to each parameter described in Appendix A.