CONTRIBUTION OF RADIATION AND NONRADIATIO N FACTORS TO THE ONSET OF PULMONARY-CANCER IN EMPLOYEES OF RADIOCHEMICAL WORKS .1.

A case-control study using logistic regression included 500 employees of the nuclear works (162 patients with lung carcinoma and 338 healthy controls). After examination of radiation and nonradiation causative factors 5 proved statistically significant. For them the following cha nce proportions were obtained: smoking 6.6, plutonium pneumosclerosis 4.6, plutonium incorporation 3.1, chronic nonspecific pulmonary diseas es 2.1, external gamma-radiation 1.6. Attributive risk for the total o f the radiation factors makes up 25% at the most while of the nonradia tion factors at least 70%.