Table of Contents
How did John Snow Use maps to study the spread of cholera?
By using a geographical grid to chart deaths from the outbreak and investigating each case to determine access to the pump water, Snow developed what he considered positive proof the pump was the source of the epidemic.
What was John Snow’s contribution to epidemiology?
In the mid-1800s, an anesthesiologist named John Snow was conducting a series of investigations in London that warrant his being considered the “father of field epidemiology.” Twenty years before the development of the microscope, Snow conducted studies of cholera outbreaks both to discover the cause of disease and to …
What is the weakness of ecological study?
In the case of the ecological study design, the obvious weakness is that data is based on groups rather than individuals. In other words, the ecological study provides group exposure and group response without knowing what any individual exposure-response was.
Why John Snow is considered as the father of epidemiology?
“For his persistent efforts to determine how cholera was spread and for the statistical mapping methods he initiated, John Snow is widely considered to be the father of [modern] epidemiology.”
What are the advantages and disadvantages of ecological studies?
Ecological studies: advantages and disadvantages
- a) The unit of analysis was the country.
- b) It can be inferred that children with lower levels of wellbeing were more likely to be living in relative poverty.
- c) It can be inferred that greater income inequality in a country caused worse outcomes for child wellbeing.
What is an example of an argument an opponent to Snow’s theory?
Answer and Explanation: One argument that has been proposed against John Snow’s theory that cholera is a water-borne disease is statistical.
What was John Snow’s major contribution to the field of epidemiology quizlet?
Who is the FATHER of FIELD epidemiology? John Snow! Famous for his study of how cholera was spread in the mid-1800s. He demonstrated the connection between the water supply and cholera in London.
What was Snow’s hypothesis and how did he test it?
Snow’s hypothesis was that contaminated water was the source of the disease, but the challenge was how to prove this to others who were skeptical. To find the evidence he needed, Snow interviewed families that had lost members to cholera, trying to find some common thread that would link the victims.
What are the strengths and weaknesses of cross sequential study?
Strengths & Weakness of Sequential Study
- Strength: Mitigated Cultural Variations. By consistently studying the same group of people, researchers are able to eliminate cultural or demographic factors from their findings.
- Weakness: Participant “Mortality”
- Strength: Observing Changes.
- Weakness: Poor Causational Analysis.
What are the advantages of cross-sectional research?
Advantages. Because you only collect data at a single point in time, cross-sectional studies are relatively cheap and less time-consuming than other types of research. Cross-sectional studies allow you to collect data from a large pool of subjects and compare differences between groups.