[Risk of lung cancer in workers belonging to the occupational group of mining and stone processing].

Out of 1580 male lung cancer patients and 3160 controls (data collected in a nationwide study) 177 patients and 197 controls belonged to the occupation "mining and processing of stone" (asbestos, metals and coal excluded). 164 (92.6%) patients had a Kreyberg I tumor, 13 patients a Kreyberg II tumor. There are significant more smokers among patients (98.9%a), all patients with a K I tumor were smokers, compared to the controls (82.2%). Patients had a significant longer smoking career (40.9 yearsa) and a higher tar exposure (TE = 2544)b compared to the controls (36.2 years, TE = 2223). Lung cancer risk (adj. for age, years of occupation, TE) of smokers belonging to occupation "stone" compared to smokers belonging to group "white collar" (no occupational exposure in their anamnesis) was R = 2.0a. Significantly higher risks (adj. for age, TE) were in relation to years of occupation: less than 10 years: R = 2.2a, 11-20 years: R = 2.7a, 21-30 years: R = 2.6a. a P less than 1%; b P less than 5%.