[Tobacco smoking and lung cancer in women: relative risk for Kreyberg groups I and II (author's transl)].

The smoking habits and history of 180 female lung cancer patients (119 cases of Kreyberg I tumors, 61 cases of Kreyberg II tumors) were analyzed in a retrospective case control study (360 female control patients suffering from not tobacco related diseases). The relative risk for smokers is 5,7 for Kreyberg I tumors (statistically significant) and 1,57 for Kreyberg II tumors. The risk for Kreyberg I tumors rises in relation to the life time cigarette consumption: less than 5000 packs of cigarettes smoked 1,94; 5000--20 000 packs smoked 6,44 (statistically significant); more than 20 000 packs 10,92 (statistically significant). The respective figures for Kreyberg II tumors are 1,2; 1,72; 1,73.