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In practical work are more often used one-stage and prospektivnye epidemiological researches with which help it is possible to capture as the organised groups of the population (the workers, serving this or that enterprise, establishment) and unorganized populations to a territorial sign (a medical site, area, a city, area etc.). сайты осетии и сайты владикавказа
The Most simple and accessible is the one-stage method. However by means of this method it is impossible to draw a definitive conclusion on value of this or that factor in disease occurrence.
More valuable prospektivnyj the method of research which is actually continuation of one-stage researches of the population and allowing to carry out long long-term supervision and repeated inspection of the same group of the population. According to V.I.Metelitsy with co-authors (1976), this method gives the chance to study frequency of occurrence of new cases of disease, value of those or other factors for an aetiology and patogeneza IBS.
By means of research ' Registers of a heart attack of a myocardium and sudden (coronary) death ' it is possible to obtain the objective data about frequency of occurrence of sharp coronary insufficiency, its outcome, quality pre-hospital, hospital and poslegospitalnoj the help to patients.
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