Lethality

Mortality (smertelnoj) - the indicator is calculated by the ratio of the number of deaths from the disease to those suffering from this disease and expressed as a percentage. Do not mix mortality mortality rates - the ratio of the number of deaths from the disease to the average population. There are mortality of patients in hospital and non-hospital mortality.
Mortality of patients in the hospital is determined in the following way:
The number of deaths X 100/Number of issued + number of the dead
Out-of-hospital mortality define a similar way - by the ratio of the number of deaths among patients treated outside hospitals (in this nosologic form of the disease).
Determine the total mortality rate is the ratio (expressed as a percentage) of the sum of the numbers of deaths in hospitals and beyond to the number of all suffering.
Assessment of mortality in hospital complex, as its value is determined not only by the quality of treatment in hospital, but the composition of the patients of different age, nosologic forms of diseases, duration of hospitalization), the quality of treatment prior to admission and other
Mortality should be analyzed mainly on separate nosological forms, studying complete medical history of the dead. The calculation of the mortality is made according to the hospital's annual reports, half-year, quarter, month. For accurate calculation of hospital mortality for the period required information about the number of patients were in the hospital at the beginning and at the end of the reporting period, and the number received, discharged, and died during this time. In these cases, the case fatality rate is calculated by the ratio of the number of deaths among under-treated patients. To compare the extent of mortality only for homogeneous groups of patients.
Improvement of living standards and improvement of sanitary culture of the population of the USSR, the successes of Soviet health caused the disappearance in our country many infectious diseases and a sharp decline in mortality from other diseases.
In the complex of factors influencing the decline in mortality, the importance of preparedness of hospitals to provide immediate assistance when entering the patient, the clear work of nurses: proper organization of care, timely and accurate execution of all prescriptions and doctor's instructions and other Cm. also Mortality.

Mortality (from lat. letalis - fatal) - smertelnoj, the ratio of the number of deaths from any disease among suffering from this disease, usually expressed in percent. Do not mix mortality and mortality (see) - the ratio of the number of deaths from the disease to the average population, among which occurred disease. Sometimes used in a hospital statistics, the term "mortality from any disease" wrong.
There are hospital mortality (number of deaths in hospitals from any disease among patients treated in them from the disease), community-acquired (the same ratio of deaths and ill treated outside hospitals) and total (the total for all the dead in hospitals and out them to suffering from the disease in hospitals and beyond). The last two indicators are few reliable because of the lack of completeness of registration of patients and not always accurate outpatient diagnoses causes of death.
The calculation of mortality should not be performed in the hospital as a whole (with the exception of those relatively rare cases when the composition of the patients in the hospital completely homogeneous), since the value of L. varies depending on the composition of the patients, making it difficult to compare sizes L. in various hospitals. It is better to compare L. from the same diseases. When calculating L. necessary to consider the influence of age, and sometimes and sex of the patients, clinical form of the disease, duration and completeness of hospitalization, etc. and compare the sizes HP only for homogeneous groups of patients, and at the small numbers of them to use standardization of indicators L. Separately measure L. complicated and uncomplicated disease.
In the case of acute diseases or exacerbation of chronic diseases hospital mortality may be an indicator of quality of work of medical institutions. The mapping L operated and unoperated patients with the same disease, and the relationship of its size with the timing and the nature of the operation is one of the ways performance surgical hospitals.
Hospital mortality from chronic diseases cannot be an indicator of quality of work of the hospital, as was discharged from the hospital patient may die from a disease after a while after discharge. In respect of such patients (patients with malignant tumors, diabetes, tuberculosis, chronic cardiovascular diseases) instead L. should determine the average life expectancy from the beginning or from the end of hospital treatment to death or sizes (%) survival rate of patients in 3, 5 and 10 years after treatment.
The in-depth study of mortality indicator should be calculated according to the data of completed cases of treatment, i.e. through the development of materials smoked medical records of all patients with the disease who were being treated. For operational purposes, the measurement L. carried out according to the hospital reports for more than a brief calendar periods (year, half a year, quarter, month). To measure L. for the period, less the average duration of treatment in this disease, you should not. Accurate measurement of hospital L. during the reporting period requires information on the number of patients who were in the hospital at the beginning and at the end of the reporting period, and the number received, discharged, and died during this time. In these cases, L. measured by the ratio of the number of deaths among under-treated patients. The last number is defined as the sum received, discharged, and the dead patients. With slow turnover (amount received and disposed less than the sum was in the hospital at the beginning and at the end of the reporting period) mortality rate measured by the ratio of the number of deaths to the total number of patients registered with the beginning of the year, and polureshetke numbers received and discharged patients. S. A. nowosielski believes measurement L. ratio of the number of deaths to the total number discharged and deceased patients are wrong, as an indicator of L. is intense, and not extensive coefficient.
The mortality rates are not constant. They depend on the age structure of patients, their reactivity organisms (which in turn depends on living conditions), improving diagnostic techniques, and hence the earlier treatment, increase the efficiency of therapeutic, surgical and other methods of treatment, etc.
Improvement of living standards and health status of the population in the USSR, the successes of Soviet health caused the disappearance in our country many infectious diseases and a sharp decline in mortality from other diseases. Further development of medicine and improving health organization in the USSR will provide a subsequent reduction L. Cm. Sanitary statistics.