The results of the study were published this month in the Annals of the Rheumatic Diseases. The 30-month study investigated 159 men, of which 19 were smokers. The smokers tended to be younger and leaner (of lower body mass index, BMI) than the men who did not smoke. However, once the results were adjusted for BMI and age, they revealed an increased risk of cartilage loss and significantly elevated pain scores in the smokers compared to the non- smokers. The researchers used MRI scans at the start, middle and end of the 30-month period to detect cartilage wear, and the men assessed their pain intensity on a Visual Analogue Scale (VAS) using a scale of 0 to 100. Osteoarthritis (OA), sometimes known as "degenaritive joint disease" is the most common type of arthritis and tends to occur in older people. Cartilage is a resilient but slippery tissue that stops bones in joints like the knees from rubbing against each other and therefore wearing each other down. In OA the cartilage becomes thin and the bones rub against each other and cause inflammation, pain and loss of mobility. In time, the joint can become swollen and misshapen, bits of cartilage break off, and also spurs of bone tissue grow across the joint. "Cigarette smoking and the risk for cartilage loss and knee pain in men with knee osteoarthritis" Shreyasee Amin, Jingbo Niu, Ali Guermazi, Mikayel Grigoryan, David J Hunter, Margaret Clancy, Michael P LaValley, Harry K Genant, and David T Felson Ann Rheum Dis, Dec 2006; doi:10.1136/ard.2006.056697

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