Twenty-seven patients (28 knees), with a median age of 42 (27-50) years treated with a high tibial osteotomy for early medial gonarthrosis (Ahlbäck's Stage I) were examined after 11 (7-18) years. Twenty-four were men; 18 knees had had previous meniscus and ligament lesions. At follow-up, 22 knees were satisfactory and 9 patients managed high-activity sports or heavy work. In 25/28 knees, the arthrotic process had not progressed radiographically.

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To investigate whether environmentally associated stress may contribute to the development of coxarthrosis, 85 males with primary coxarthrosis and 262 male urological patients were questioned about their occupation, and their hips were graded radiologically. Patients with coxarthrosis had been more frequently exposed to heavy labour, heavy lifting, and much tractor driving. Our results indicate that environmentally associated stress, as reflected by a varied life style or occupation, may contribute to the development of coxarthrosis.

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