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Table 1 Distribution of exposures across 121 job groups comprising 686 occupational titles in The Lower Body Job Exposure Matrix

From: An expert-based job exposure matrix for large scale epidemiologic studies of primary hip and knee osteoarthritis: The Lower Body JEM

Exposure Grand mean 10thpercentile 50thpercentile 90thpercentile
Standing/walking (hours/day) 5.3 3.0 5.7 6.6
Kneeling/squatting (hours/day) 0.4 0 0.2 1.1
Whole-body vibration (hours/day) 0.1 0 0 0.2
Total load lifted (kg/day) 955 193 590 2525
Frequency of lifting loads weighing ≥20 kg (times/day) 10.2 1.2 6.0 21.5
  1. The table excludes 1421 occupational titles estimated to entail mechanical exposures below the screening levels* for all five exposures.
  2. *Standing/walking ≥6 hours/day, kneeling/squatting > ½ hour/day, whole-body vibration >2 hours/day, lifting >2 tons/day, or lifting loads weighing ≥20 kg ≥10 times/day.