Keywords: Bladder cancer, cigarette, drugs, occupational factors, risk factors status released display-pdf yes is-olf no is-manuscript no is-preprint no is-journal-matter no is-scanned no is-retracted no Introduction Nowadays, about 10% of deaths worldwide are due to cancers and it is estimated that the incidence of cancer worldwide would undergo an increasing trend.[ 1 , 2 , 3 ] Bladder cancer is a common cancer in the world.[ 3 , 4 ] Of cancers known and under investigation in the country, bladder cancer is ranked fifth,[ 5 , 6 ] however, in Kurdistan province it is ranked third in men and fourth in both sexes.[ 7 , 8 ] Overall, bladder cancer is the twelfth major cause of years of life lost due to premature death or disability per every 1000 people in Iran.[ 8 ] This disease is more prevalent in industrial environments.
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