Table 1: Demographics, health, and work-related characteristics of the study population.

AllSedentary workersPhysically active workers
NMean (SD)%NMean (SD)%NMean (SD)%

Age, years831943.7 (11.4)375344.3 (10.8)434943.2 (11.8)
BMI (kg.m-2)817325.4 (4.4)369825.3 (4.5)426525.6 (4.4)
Gender
 Women477957.5218858.3246956.8
 Men354042.6156541.7188043.2
Smoking
 No, never385346.9190451.2186843.6
 Ex-smoker241729.4113830.6122828.6
 Yes195023.767918.3119227.8
Physical activity, leisure
 Low112113.645812.362314.5
 Moderate563168.5268072.0282665.9
 High146717.958515.783919.6
Physical activity at work
 Sedentary work375346.33753100.000.0
 Physically active work434953.700.04349100.0
Psychosocial work factors (0-100)
 Emotional demands816145.3 (25)370743 (23.3)428747.2 (26.2)
 Influence at work810066.6 (24)368971 (22.4)424662.9 (24.6)
 Support from colleagues765172.5 (21.5)342572.2 (21)407272.8 (21.8)
 Support from leader782268.6 (26)352469.3 (25.8)414168.2 (26)
Pain intensity (0-9)
 Neck/shoulder83013 (2.3)37462.9 (2.2)43393 (2.3)
 Low back83102.9 (2.5)37532.5 (2.4)43413.2 (2.5)
 Arm/hand83021.8 (2.3)37471.6 (2.2)43401.9 (2.4)
Back disease
 No669981.0309982.9343479.6
 Yes156819.064117.187920.4
Previous long-term sickness absence
 No753790.6350093.3384488.4
 Yes7829.42536.750511.6
Long-term sickness absence during 2-year follow-up
 No747589.9345091.9383788.2
 Yes84410.23038.151211.8