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Published on 16 Apr 2011
School
Department
Course
HLTA10
Lecture 10
April 4th, 2011.
Epidemiology and demography in health research/Epidemiological research
designs
Epidemiology
The study of the distribution and determinants of health related states in specified
populations and the application of this study to control health problems
Basic science of public health
What are the factors that can cause the disease? Where is occurs?
Health related states- measures of health, not just disease and mortality
Focusing on populations
Then it goes on to apply the study to control health problems; this is why its the
basic science of public health
Demography
Study of human populations, including their size, composition, distribution and
growth as well as the causes and socioeconomic consequences of changes in these
factors
Study of patterns in human populations
Birth rates, death rates, immigration, emigration, etc. Anything related to the
patterns of human populations
Role in Health research
Epidemiology: Subfields/Levels
A)Classified on Level upon which the research focuses on
1. Internal, within the body= Clinical Epidemiology (researches focus on an
individual and want measurements for instance biochemical levels in
individual)
2.Behaviour= Social epidemiology (considers determinants on development on
health and disease) i.e. link between societies and tendency to uptake
smoking individual behaviours
3.Contextual/Structural; outside of the individual = Critical epidemiology
(researches count on to get important policies into place; emphasis is on social
and power relationships) contextual factors that would contribute to the
health status of concerned populations
B)Classified based on type of disease
1.Communicable disease epidemiology (focus on infectious diseases)
2.Chronic-disease epidemiology (certain diseases that are chronic)
C)Classified based on environment where study takes place
1.Community epidemiology
2.Occupational epidemiology (classified based on the workplace; or diseases in a
certain workplace)
D)Classified based on tools
1.Quantitative epidemiology
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Document Summary

Epidemiology and demography in health research/epidemiological research designs. Demography: study of human populations, including their size, composition, distribution and growth as well as the causes and socioeconomic consequences of changes in these factors, study of patterns in human populations, birth rates, death rates, immigration, emigration, etc. Anything related to the patterns of human populations. Epidemiology: subfields/levels: classified on level upon which the research focuses on. Each of the subfields takes an important role in health research. All studies can be classified as experimental or natural; very broad. Usually a population of interest in queried in terms of different possible exposures and outcomes at one period in time. Can not clearly determine exposure and outcome temporal association can not be determined. Descriptive studies gives idea of hypotheses, but we still are not able to test the hypothesis and require a study that evaluates it.

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