... 65:72-89.28. Toivanen AT, Heliovaara M, Impivaara O, Arokoski JP, Knekt P, Lauren H, Kroger H: Obesity, physically demanding work and traumatic knee injury are major risk factors for knee osteoarthritis ... sewersPlant and machine operators and assemblersOperators and unskilled labourBuilding construction labourers, heavy truck- and lorry driversCleaners, factory workElementary occupationsArmed ... cited.Research articleAssociation between occupation and knee and hip replacement due to osteoarthritis: a case-control studyJonas Franklin*1,2, Thorvaldur Ingvarsson1,3,4, Martin Englund2,5...