[Changes in occupational morbidity among workers of petroleum, oil-processing and petroleum chemical industries over 40 years].

Analysis covered 3784 cases of occupational diseases diagnosed first in Research Institute for Industrial Medicine and Human Ecology in Ufa from 1960 till 2000. Locomotory and peripheral nervous system disorders appeared to predominate in structure of occupational morbidity. The authors failed to reveal direct correlation between occupational morbidity level and work conditions jeopardy class.