A major advantage of cohort studies in general is the
possibility to study multiple exposures and multiple outcomes in one cohort
. Even rare exposures can be studied, for the index group can be selected on this exposure.
What is not an advantage of a cohort study?
A major advantage of the cohort study design is
the ability to study multiple outcomes that can be associated with a single exposure or multiple exposures in a single study
. Even the combined effect of multiple exposures on the outcome can be determined. Cohort study designs also allow for the study of rare exposures.
Which of the following is not an advantage of a prospective cohort study?
A major advantage of cohort studies in general is the
possibility to study multiple exposures and multiple outcomes in one cohort
. Even rare exposures can be studied, for the index group can be selected on this exposure.
What are the advantages of a prospective study?
Prospective studies are carried out from the present time into the future. Because prospective studies are designed with specific data collection methods, it has the advantage of
being tailored to collect specific exposure data and may be more complete
.
What are the disadvantages of a retrospective study?
- inferior level of evidence compared with prospective studies.
- controls are often recruited by convenience sampling, and are thus not representative of the general population and prone to selection bias.
- prone to recall bias or misclassification bias.
What are the 3 types of cohort studies?
- An internal comparison group.
- A comparison cohort.
- The general population.
What are the types of cohort studies?
There are two types of cohort studies:
Prospective and Retrospective
. The two groups of cohorts (exposed and un-exposed) are followed prospectively over time to track the development of new disease.
What is an example of a cohort study?
One famous example of a cohort study is
the Nurses’ Health Study
, a large, long-running analysis of women’s health, originally set up in 1976 to investigate the potential long term consequences of the use of oral contraceptives.
What is the purpose of a cohort study?
A cohort study identifies a group of people and follows them over a period of time. The aim is
to look at how a group of people are exposed to different risk factors which may affect their lives
. Cohort studies can look at many different aspects of people’s lives, including their health and/or social factors.
Does cohort study have control group?
Cohort studies differ from clinical trials in that no intervention, treatment, or exposure is administered to participants in a cohort design; and no control group is defined. Rather, cohort studies
are largely about the life histories of segments of populations and the individual people who constitute these segments
.
What is an example of a prospective study?
Prospective Cohort Studies: … The Framingham Heart Study,
the Nurses Health Study
, and the Black Women’s Health Study are good examples of large, productive prospective cohort studies. In each of these studies, the investigators wanted to study risk factors for common chronic diseases.
Is prospective cohort study good?
Observational studies in general and cohort studies in specific are a good source of information when an experiment is not feasible. Prospective cohort studies
provide valuable information when studying the relationship between exposure and outcome
.
When would you use a prospective cohort study?
A research study that follows
over time groups of individuals who are alike in many ways
but differ by a certain characteristic (for example, female nurses who smoke and those who do not smoke) and compares them for a particular outcome (such as lung cancer).
What is the purpose of retrospective cohort study?
Retrospective cohort studies are a type of observational research in which
the investigator looks back in time at archived or self-report data to examine whether the risk of disease was different between exposed and non-exposed patients
.
What is the difference between retrospective and prospective cohort study?
In prospective studies, individuals are followed over time and data about them is collected as their characteristics or circumstances change. Birth cohort studies are a good example of prospective studies. In retrospective studies,
individuals are sampled and information is collected about their past
.
What are the strengths of a retrospective cohort study?
- They are useful for rare exposures, e.g., unusual occupational exposures.
- They are cheaper and faster than prospective cohort studies.
- They are more efficient for diseases with a long latency period.
