State Institution “Ukrainian research institute of industrial medicine”, Kryvyi Rih
Introduction. In Ukraine, such factors as psychosocial and occupational conditions are traditionally underestimated. However, these factors are especially significant in industrialized regions, such as Dnipropetrovsk region in general and Krivoy Rog, in particular.
Aim. To develop an integral indicator of work severity and intensity; to determine its effect on occurrence of cerebrovascular diseases in workers with the whole body vibration exposure.
Materials and research methods. The study covered 178 patients with vibration disease caused by the whole-body vibration, of which 149 patients - without cerebrovascular diseases, 29 - with cerebrovascular diseases.
Results and its discussion. In order to assess the severity and intensity of work, we propose an integral indicator - a harmfulness coefficient of work severity and intensity. It is calculated according to a card of work environment evaluations, paragraphs 12-15 (severity and intensity of work). In fact, the coefficient of harmfulness is an indicator which evaluates the number of work severity and intensity parameters that exceed the standard ratios. The greater is the coefficient, the greater is the risk of the cerebrovascular diseases, which can indicate a significant impact of work intensity and severity to the development of such diseases. According to the obtained data further studies of work intensity and severity are required to show them as cerebrovascular disease risk factors. Correlation and regression analyses show even more significant relationship between the coefficient of harmfulness and the incidence of cerebrovascular diseases, than between coefficient and incidence of arterial hypertension or ischemic heart disease. Thus, it may indicate that simultaneous impact of work intensity and severity have both indirect (through arterial hypertension development) and direct influence on incidence of cerebrovascular diseases.
Conclusion. Correlation and regression analysis revealed a relationship between the coefficient of harmfulness of work intensity and severity and the incidence of cerebrovascular diseases in miners with vibration disease caused by the whole-body vibration. The higher is the coefficient, the higher is the risk of cerebrovascular disease development. The coefficient of harmfulness can be used in assessing risk of cerebrovascular disease in workers exposed to the whole-body vibration. Considering the data of our and other studies, it can be stated that the intensity and severity of work are significant risk factors for cerebrovascular diseases.
Key words: work intensity, work severity, cerebrovascular disease, miners, occupational risk, whole body vibration.
ORCID ID of author of the paper:
Yashchenko D. A. (ORCID 0000-0002-2925-4288)