Science Quiz / I&P 2: Types of Studies

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Name the type of study from the description

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Observational study where the variable is measured on a group (not individual) level - less prone to bias but cannot always be applied to the individual
Recording new cases using a pre-specified population
Provides information on new, unobserved conditions, is quick and easy but is not scientific and open to observer bias
Actively expose one group and compare to control over time - the 'gold standard' with strongest evidence, but can be unethical
Retrospectively study risk factors that may have lead to disease - good for rare diseases, open to selection/participation bias
Following a sample over time and studying which groups contract the disease - can study multiple outcomes, but are expensive and inefficient
Snapshot of prevalence of an outcome - only one point in time, sampling frame may lead to bias

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