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吸香烟和其他类型的烟草与发生下尿路肿瘤(膀胱肿瘤)有一定关系。根据波士顿,麻萨诸塞,曼彻斯特,联合王国和日本名古屋的发病病例和对照组的调查已得到证实,并对此作出评价。波士顿593例和对照组588例(1976年5月～1977年5月)麻萨诸塞553例和对照组731例(1976年10月～1978年9月)以及名古屋290例和对照组588例(1976年1月～1978年12月)的调查分析结果,吸烟者的膀胱肿瘤发生率男性约2倍、女性约2.4倍高于不吸烟者。发生率的增加常与吸烟次数和深吸入的增加有关。波士顿的调查发现男性每天吸烟2包或更多而又深吸入者,其发生率6.6倍、麻萨诸塞8.1倍、名古屋2.6倍高于不吸烟
Smoking cigarettes and other types of tobacco and the occurrence of lower urinary tract tumors (bladder tumors) have a certain relationship. A survey of the incidence of disease and control subjects in Boston, Massachusetts, Manchester, the United Kingdom and Nagoya, Japan, has been confirmed and evaluated. 593 cases of Boston and 588 cases of control group (May 1976 ~ May 1977) 553 cases of Massachusetts and 731 cases of control group (October 1976 ~ September 1978), Nagoya 290 cases and control group 588 cases (January 1976 ~ December 1978) survey and analysis of the results, the incidence of bladder cancer smokers about 2 times the men and women about 2.4 times higher than non-smokers. The increase in the incidence is often related to the number of smokers and the increase in deep inhalation. A Boston survey found that men smoked 2 or more and inhaled more daily, with a 6.6-fold incidence, Massachusetts 8.1-fold and Nagoya 2.6-fold higher than nonsmokers