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Of 1015 men over the age of 60, 125 (12.3%) were found to have dipstick haematuria on a single test. Analysis of smoking history revealed a 1.6 fold increased incidence of dipstick haematuria in current smokers as compared with ex-smokers and non-smokers. The relationship with bladder cancer and smoking is discussed. Several commonly used drugs, including nonsteroidal anti-inflammatory preparations, have been implicated as a cause of urinary tract bleeding. In this study of 1015 men over the age of 60, no association was found between the presence of dipstick haematuria and the intake of aspirin, other nonsteroidal anti-inflammatory drugs or warfarin.