Gigiena i sanitariia
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Numerous epidemiological surveys show the ambiguity of evaluation of stable organic chlorine compounds as a risk factor for breast cancer (BC). This is likely to be, to a certain degree, associated with the specific features of performance of epidemiological surveys. The selection of cases of BC from different areas has provided groups with different levels of exposure that as judged from the content of the above substances in the biological environments. ⋯ The analytical epidemiological study using a case-control approach has revealed the significance of biological (BC in relatives, childlessness), occupational (women's work at CVZH) and environmental (pollution, the more frequent ingestion of local pork and fish than in the control group) risk factors of BC. In the 1950-1960s, the largest Russian enterprises of chlorine chemistry worked most actively not only in Chapayevsk, but also in towns with plants of chlorine industry, such as Dzerzhinsk, Novomoskovsk, Sayansk, Usolye-Sibirskoye, and others. Ecological and epidemiological studies should be organized in these towns in order to define the value of SOP as a risk factor of BC for general populational groups.
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Gigiena i sanitariia · Jan 2005
Comparative Study[Analysis of a school timetable, bearing in mind the health status of children].
A type of medical examination of a school timetable is proposed, by bearing in mind the actual educational price established at a specific educational establishment. The ratio of the physiological and emotional stress in pupils during schooling to their learning progress and physical fitness is the price of schooling. The study has revealed no direct relationship between the level of schooling load and the price of education. There are difficulties in learning within the first days of a week and a need for additional efforts to maintain the pupils' working capacity at the end of a week.