Epidemiological research on the relationship between tobacco, alcohol and cancer.

Several studies of descriptive and analytic epidemiology have permitted the investigation of cancers linked to the use of tobacco and alcohol. The tobacco and alcohol cancer group consists of the upper respiratory and alimentary tract, lung and bladder, which accounts for 50% of the cancer in men. When both factors are implicated, the proper role of each could be established. These data should be considered in decision-making for cancer prevention.