Table 2

Factor analysis of occupational physical activity and psychosocial stressors: variable loading and explained variance related to each factor

O*NET itemsRotated factor loadings*
Factor 1Factor 2Factor 3Factor 4
Occupational physical activity
General physical activities†0.86−0.10−0.190.18
Bending or twisting the body0.840.040.320.01
Handling and moving objects0.81−
Walking and running0.800.270.01−0.15
Kneeling, crouching or stooping0.78−0.22−0.11−0.09
Keeping or regaining balance0.760.170.22−0.18
Interpersonal stressor
Dealing with unpleasant or angry people0.010.940.140.05
Dealing with conflict situations−0.150.85−0.240.21
Dealing with physically aggressive people0.360.71−0.020.18
Resolving conflicts and negotiating with others−0.340.62−0.370.37
Automated work
Making repetitive motions0.18−0.050.80−0.21
Pace determined by speed of equipment0.23−0.150.76−0.01
Degree of automation−0.470.050.680.07
Job responsibility
Consequence of error0.090.20−0.030.86
Making decisions and solving problems−0.400.31−0.330.66
Importance of being exact or accurate−0.390.430.440.51
Proportion of explained variance (%)35.520.113.56.7
Cumulative explained variance (%)35.555.669.2  75.8
Cronbach's α‡0.920.840.65
  • *Contribution of Occupational Information Network (O*NET) item to each factor. Bold numbers indicate absolute loadings ≥0.70.

  • †Performing physical activities that require considerable use of arms and legs and moving the body such as climbing, lifting, balancing, walking, stooping and handling of materials.

  • Internal consistency among O*NET items with absolute loadings ≥0.70.