Table 4

Physical work load according to internal JEM assessment and osteochondrosis or spondylosis of the lumbar spine

VariableReferentsOsteochondrosis or spondylosis with chronic complaints, with or without disc herniation“Pure” osteochondrosis or spondylosis with chronic complaints (cases with disc herniation excluded)
CasesAdjusted OR4-15095% CICasesAdjusted OR4-15095% CI
n%n%n%
Sum of forces to the lumbar spine through lifting, carrying, or extreme forward bending, calculated on the basis of the means of the individual workload assessments performed by the referents within a given occupational group (Nh):
 <3.0×106 4623.4219.21.099.61.0
 3.0–<6.0×106 5326.93816.61.60.7 to 3.51111.70.70.2 to 2.5
 6.0–<10.5×106 5025.45524.02.61.2 to 5.72526.62.20.8 to 6.4
 ⩾10.0×106 4723.911550.26.02.7 to 13.44952.12.80.9 to 8.5
 Unknown10.5
 p Value for trend4-151 p<0.00005p=0.01
Sum of forces to the lumbar spine through lifting, carrying, or extreme forward bending, calculated on the basis of the medians of the individual workload assessments performed by the referents within a given occupational group (Nh):
 06432.54218.31.01718.11.0
 >0–<0.8×106 4221.34218.31.70.9 to 3.41920.22.61.0 to 6.6
 0.8–<4.0×106 4623.44620.11.80.9 to 3.41920.21.90.8 to 4.8
 ⩾4.0×106 4422.39943.23.72.0 to 6.83941.52.91.2 to 6.9
 Unknown10.5
 p Value for trend4-151 p=0.0001p=0.04
  • 4-150 Adjusted for age, region, nationality, and other diseases of the lumbar spine.

  • 4-151 Exposure score included as a continous variable in the logistic regression model.