Methodology of Methodology of morbidity study morbidity study (general, with the (general, with the temporal disability) temporal disability)
Jan 12, 2016
Methodology of Methodology of morbidity studymorbidity study
(general, with the (general, with the temporal disability)temporal disability)
Morbidity of population
is a collapsible concept that includes values, which are characterizing the level of different diseases and their structure among all population or its separate groups on the given territory.
Exceeding of morbidity epidemic thresholds for overall population grey - No data ; green- less 20%; orange- 20%; red- 49%
The main methods for studying the morbidity are those one, which foresee the use of such given:
• - appeals for medical help in medical establishments;
• - medical examinations of separate groups of population;
• - about the reasons of death;
• - questioning of population;
• - special selective researches.
Comparative description of basic methods of studyingthe population morbidity
Name of method
Advantages of method Disadvantages of method
1. Method of registration
• availability for all layers of population;
• aninterrapting and dynamics of supervision the state the health of population;
• effectiveness of diseases account;
• most complete account of acute diseases;
• possibility of selection of the diseases first registered during the year;
• much more economy
• incomplete account of chronically diseases:
• incomplete account of initial symptomless stages and forms of diseases;
• incomplete account of diseases in cases: insufficient availability of medicare, insufficient plenitude of diseases registration and degree of specialization of medicare, bad sanitary culture of population; during service of population in private medical establishments
Comparative description of basic methods of studyingthe population morbidity
Name of method
Advantages of method
Disadvantages of method
2. Studying of the morbidity according the results of medical examinations
almost a complete account of chronical diseases; “exposure of diseases on initial stages”;
the independence of examinations results from availability of medicare, sanitary culture of population etc.
• impossibility of account of acute diseases;
• scope of only separate groups of population: children, young people, workers of some professions;
• high price
International statistical classification of diseases of the last Tenth revision (ICD-10) was ratified by the forty-
third Assembly of WHCO January, 1, 1993. In obedience to the decision of
the Assembly the document has a new name "International statistical
classification of diseases and close problems of health protection", though
the comfortable abbreviation ICD is preserved
International classification of diseases of the Tenth revision (ICD-10)
I Infectious and vermin diseases
II New formation
III Diseases of blood and blood producing organs and separate violations with bringing in of immune mechanism
IV Endocrine diseases, disorders of feed and metabolic disturbances
V Disorders of psyche and behavior
VI Diseases of the nervous system
VII Diseases of eye and its additional vehicle
VIII Diseases of ear and papillary sprout
IX Diseases of the system of blood circulation
X Diseases of breathe organs
XI Diseases of digestion organs
XII Diseases of skin and hypodermic cellulose
XIII Diseases of the bone-muscle system and connecting tissue
XIV Diseases of the urogenital system
XV Pregnancy, births and post-natal period
XVI Separate conditions which arise up in a perinathal period
XVII Born defects of development, deformations and chromosomal anomalies
ХVIII Symptoms, signs and deviations from the norm, that appear at clinical and laboratory researches, not classified in other headings
XIX Traumas, poisonings and some other results from action of external factors
Besides 19 classes of Diseases, two additional headings are included into
ICD-10:
• ХХ External reasons of morbidity and death rate
• ХХІ Factors which influence the state of population health and appeal to establishments of health protection
Basic sources of information and values, which characterize the separate types of morbidity
Methods of study, types of morbidity
Basic information sources Basic values
From data of appeals for medical helpGeneral morbidity
Statistical coupon for registration of final (specified) diagnosesCoupon of ambulatory patient
The general morbidity (prevalence of diseases) Primary morbidity Structure of general and primary morbidity
Infectious Urgent report Level and structure of infectious morbidity
Nonepidemic Report about the important nonepidemic diseases
Level and structure of nonepidemic morbidity
Hospitalized patients Statistical card of patient. that left permanent establishment
Level and structure of morbidity of the hospitalized patients
With the temporal disability Bulletin Number of cases of temporal disability (ТD) on 100 workersNumber of the calendar days ТD on 100 workersMedium duration of one case ТD
From data of medical examinations (aimed, previous)
List of persons which are subject to the medical examinations
From data about the reasons of death Medical certificate about deathMedical certificate about perynathal deathMedical assistant’s certificate about death
Values of level and structure of morbidity, that led to death
There are such basic values of general
morbidity:
• — primary morbidity (Іпсіdепсе) - the level of t first registered diseases for a calendar year on this territory; all sharp and first set for a year chronic diseases are taken into account also:
• — general morbidity, or prevalence of diseases (Рrеvаlепce) – the level of all registered diseases for a calendar year: sharp and chronic (registered at the first appeal in a current year, and exposed both in current and in previous years);
• — structure primary and general morbidity of population
The method of calculation of the values.
Name of values Method of calculation
Primary morbidity
Amount of diseases which are registered first at current year (all acute + first exposed chronic diseases) х 1000
Average annual quantity of population
General morbidity (prevalence of all registereddiseases)
Amount of all registered during this year diseases (acute + chronic, exposed both in current and in previous years) x 1000
Average annual quantity of population
Structure of primary, general morbidity (prevalence)
Amount of all diseases of this class, group, nosology form registered for a year
(first registered) х 100
Amount of all (first) diseases registered for a year
Every case of disease or suspicion on it is a unit of supervision at the study of infectious morbidity. "Urgent report about the infectious disease, food, acute professional poisoning" (f. № 058/r) is filled at the exposure of them, and it is a basic document for the study of epidemic morbidity.
The following values are used for the analysis of infectious morbidity:
• frequency of the exposed diseases (correlation of their number to the quantity of population of this territory; values are calculated per 100 thousands of population);
• seasonality (data about the number of diseases on months are taken as a basis. The indices of seasonal vibrations are correlation of data during month to average annuals);
• frequency of hospitalization and plenitude of it embrace (in the first case it is correlation of number of hospitalized persons to the quantity of population, in the second — the correlation of the number of hospitalized persons to the number of exposed diseases in percents);
• frequency of diseases after age, sex, profession (correlation of diseases number in the each group to the quantity of population of this group):
• number of exposed bacillus carriers on 1000 inspected persons.
Morbidity on the major nonepidemic diseases
Some nonepidemic diseases are the subject of the special account:
• malignant new formations;
• psychical diseases;
• venereal diseases;
• active tuberculosis;
• difficult mycosis.
The necessity of the special account of the indicated diseases is conditioned by:
• the high level of distribution;
• considerable frequency of death rate at some of them;
• epidemiology meaningfulness;
• a social conditionality.
Morbidity with the temporal disability
• The case of disability is unit of account.
• The registration document for registration of each case of temporal disability of a worker during the year is a bulletin.
Morbidity of working persons with the temporal disability is analyzed on such basic values:
Value of cases of temporal disability on 100 working persons
=
Absolute number of cases at temporal disability
• 100 Medium quantity of working persons
Value of calendar daystemporal disability on 100
working persons =
Absolute number of calendar days of temporal disability - 100
Medium quantity of working persons
Medium duration of case of temporal
disability=
Number of calendar days of temporal disability
Number of cases of temporal disability
Value of structure of morbidity with the temporal disability
=
Number of cases (or calendar days) of disability from this disease · 100
Number of cases (days) of disability at all diseases
A dynamics of the primary morbidity in general prevalence
depending on the age
• Children (0-14 years) – 80 %
• Working age – 51 %
• Disabled age – 24 %
Diseases are most widespread at the men and women
MansMans WomenWomen
Chronic bronchitis
Traumas and poisonings
Ulcerous illness of stomach
Psychical disorders
Illnesses of the peripheral nervous system
Тhyrоtoxicosis
Diabetes
Hypertensive illness
Cholecystitis
Illnesses of the urinary system
Cerebrovascular illness
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