What does it mean when an observational study is retrospective\' When does it me
ID: 3201747 • Letter: W
Question
What does it mean when an observational study is retrospective' When does it mean when an observational study is prospective? What does it moan when an observational study is retrospective? A retrospective study requires that individuals look back in three or require the researcher to look at existing records A retrospective study collects the data over time A retrospective study is a list of all individuals in a population along with certain characteristics of each individuals What does it mean when an observational study is prospective? A prospective study requires that individuals took hack in time or require the researcher to look at existing records A prospective study collects the data over time. A prospective study is a list of all individuals in a population along with certain characteristics of each individual.Explanation / Answer
Solution :-
Observational studies, also called epidemiological studies, are those where the investigator is not acting upon study participants, but instead observing natural relationships between factors and outcomes. Retrospective studies are those where data are collected from the past, either through records created at that time or by asking participants to remember their exposures or outcomes. Retrospective studies cannot demonstrate temporality as easily and are more prone to different biases, particularly recall bias. Prospective studies follow participants forward through time, collecting data in the process. Prospective studies are less prone to some types of bias and can more easily demonstrate that the exposure preceded the disease, thereby more strongly suggesting causation.
Therefore the answer to the first question that is,
What does it mean when an observational study is retrospective?
As it looks at data from the past either through recall or records. Therefore, option A is correct.
What does it mean when an observational study is prospective?
As it gathers data over time by following the individuals in the study and recording data as they occur. Therefore, option B is correct.
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