Question
With the help of a flow chart, classify the various research design’s available in epidemiological research.
Answer :
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In observational studies, the researcher observes and systematically collects information, but does not try to change the people (or animals, or reagents) being observed. In an experiment, by contrast, the researcher intervenes to change something (e.g., gives some patients a drug) and then observes what happens. In an observational study there is no intervention.
Examples of observational studies:
· A survey of drinking habits among students;
· A researcher who joins a biker gang to study their lifestyle (note, as long
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