[Multifactorial analysis of risk factors for lung cancer in the city of Tula].

A multifactorial epidemiologic study of high incidence of lung cancer was conducted in the city of Tula. Mathematical methods of pattern recognition were used. The influence of 20 factors of risk was evaluated. The leading ones were tobacco smoking, occupational exposure to carcinogenic substances and precancerous lesions in the lungs. The influence of industrial pollution on cancer morbidity was assessed as moderate. Mathematical estimates for effectiveness of correction of "controllable" risk factors were given.