Table 1

Description of the study population

VariableTotal group (n=7274–7494) Mean (SD) or %
Fatigue53.35 (21.62)
% Education low30.0
% Education medium32.3
% Education high37.7
Age40.36 (8.86)
% Male74.5
Psychological job demands33.06 (5.60)
Skill discretion36.76 (5.43)
Decision authority35.83 (6.93)
Supervisor support10.59 (2.27)
Co-worker support11.92 (1.55)