Study of environmental objects
To assess the conditions in which a person lives and works (housing, catering units, industrial enterprises, childcare facilities), hygiene uses two main approaches:
- Method of sanitary inspection. This is a basic tool in which a specialist personally visits the facility, visually assesses its condition, and records the results in special sheets.
- Laboratory method. Necessary for an objective characterization of the environment. It includes a set of studies (physical, chemical, biological, microbiological) that allow for precisely determining the composition of water, air, soil, or food products.
Studying the impact of the environment on the body and the experimental method
To understand how specific environmental factors (air, nutrition, working conditions) affect a person, the following are used:
- Physiological methods;
- Anthropometric methods;
- Biochemical methods.
The experimental method stands out separately. Its essence lies in the artificial modeling of certain environmental conditions. This allows for a detailed study of the body's response (animal or human) to a specific factor in a controlled setting.
Methods of studying population health
Assessing the health status of large groups of people requires large-scale approaches:
- Epidemiological method. Studies the influence of endogenous (age, genetics) and exogenous (nature, society) factors on health. Based on the analysis of medical records during cross-sectional or longitudinal observations, culminating in the calculation of health indicators.
- Sanitary-statistical methods. Used to assess demographics (birth rate, mortality rate), morbidity and disability levels, as well as the physical development of children.
- Clinical methods. Aimed at detecting premorbid states — the earliest signs of pre-disease in practically healthy individuals exposed to negative factors. Modern immunological and biochemical tests are used for this purpose.
Hygienic diagnostics
Hygienic diagnostics is a system for assessing the relationship between environmental conditions and population health. It includes health diagnostics, environmental diagnostics, and establishing a reliable connection between them.
Unlike clinical diagnostics, which studies a disease that has already developed, hygienic diagnostics is prenosological. Its goal is to detect stress in human adaptive systems even before visiting a doctor. The subjects of study here include immune status, enzyme systems, mental activity, lipid peroxidation processes, and cardiovascular system regulation. A striking example is the assessment of lung cancer risk in smokers using modern tests before clinical symptoms appear.
Briefly: answers to topical questions
What stages does the epidemiological method include?
The epidemiological method includes the analysis of medical records and reporting documents during examinations, culminating in the calculation of population health indicators. Within this method, the following activities are carried out:
- Cross-sectional examinations — conducting «transverse» medical examinations.
- Longitudinal observations — conducting «longitudinal» observations in outpatient and inpatient settings.
- Calculation of indicators — the final stage of assessing the impact of endogenous (genetic, age) and exogenous (social, natural) factors on health.
To remember the main groups of methods, use the «SEC» rule: S — Environment (survey, laboratory), E — Organism (physiology, clinic, experiment), C — Figures/population (epidemiology, statistics).
Class and exam questions
What are pre-morbid states?
These are early, hidden signs of pre-disease in practically healthy individuals, detected by clinical and laboratory tests before a pronounced disease develops.
What is the epidemiological method used for in hygiene?
It is needed to study how exogenous and endogenous factors alter population health indicators through the analysis of medical documentation and observations.
What is the difference between hygienic and clinical diagnostics?
Clinical diagnostics studies an already emerged disease and its severity, whereas hygienic diagnostics is prenosological — it identifies adaptation disorders and disease risk even before visiting a doctor.
What else to study on this topic
- Types of prevention: primary, secondary, and tertiary
- Main components of a healthy lifestyle (HLS)
- Factors shaping the health of the nation
- Tasks of hygiene and the role of health education
- The relationship of hygiene with related disciplines
Master the entire topic in the "Hygiene" course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on «Methods of hygienic research» and 530 more pages of the subject
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 95 video lessons for the subject
Other topics in the section "Introduction. Subject, History, Modern Environment"
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.