... University, Lund, SE-22185, Sweden, 3Department of Health Sciences, University of Akureyri, Nordurslod 2, IS-600, Iceland, 4Faculty of Medicine, University of Iceland, Vatnsmyrarvegi 16, Reykjavík, ... Kroger H: Obesity, physically demanding work and traumatic knee injury are major risk factors for knee osteoarthritis a population-based study with a follow-up of 22 years. Rheumatology (Oxford) ... Osteoarthritis of the knee and hip and activity: a systematic international review and synthesis (OASIS). Joint Bone Spine 2006, 73:442-455.27. Jensen LK: Knee osteoarthritis: influence of work involving...