[Epidemiological studies of ischemic heart disease and arterial hypertension among the industrial workers and administrative employees in the "Napreduk" factory in Plovdiv].

Five hundred and ten industry workers and 100 administrative employees from the plant "Napredăk"--Plovdiv were studied consuming the same quantity of calories (from 2500 to 3500). The working processes of the workers are mechanized in 70 per cent. The production is based on the conveyor system. Reduced physical activity is established but intensified psychic strain. Reduced physical activity is also established in the administrative employees and high mental loading. All men and women, aged 25-75 were examined for ischemic heart disease (IHD). IHD was found in 30.59 per cent among the industry workers (31.14 among men and 29.38 among women). IHD in 48 per cent (41.9 among men and 34.37 per cent among the women) was found in the administrative employees. The role of certain risk factors for IHD was studied. Arterial hypertension proved to be one of those risk factors with statistical significance, as well as obesity, hyperlipidemia (over 800 mg%), hypercholesteremia (over 250 mg%). Arterial hypertension was confirmed in 12.3 per cent of industry workers and in 19 per cent the administrative employees. More important and statistically significant factors for it are: obesity, hyperlipidemia, hypercholesteremia and neuropsychic strain.