What is a retrospective study?
Retrospective study can be defined in several different ways. It is often considered to be a "view of time" to determine causal factors, but as study or participants can be selected, they may vary considerably. For example, a graph audit could be a form of a retrospective study in which all people were selected by those who had some common illness or other factor. Alternatively, the study could look at the death of many people and try to retrospectively determine the cause. In both cases, this cannot be a double blind or well -selected study because the study was not designed before the events occurred. These audits do not necessarily include any interaction with patients, but may or may include interviews with medical staff. Such studies could try to find the cause of the continuation of infections, the high incidence of the disease, the low level of patient satisfaction or many other things, and this is the analysis that medical graphs reveal and seek further data.
In some cases, it is very easy to provide convincing information about things to audit the graph. For example, if a physician in a hospital is unable to write down allergies to medicines and in patients there is a sudden increase in anaphylactic reactions, it may be quite clear where the problem lies. Sometimes the matter is not as simple as the sudden increase in the percentage points of death in the hospital. In the past, it may not always be possible to conclude from the data whether it is related at all and the answers may be more hypothesis than real conclusions due to insufficient information. The mysteries can remain a mystery because the experiment was designed for reality.
with many other forms of retrospectutive study, this is one of the falls. Since the event has already appeared, it has created its own group of participants less than a scientific way. It is impossible to strictly apply the same tests of participants in the study to make sure there are no huge variables for participantsEré will have or blur any data results. This does not mean that a retrospective study is not useful, but it may mean that the conclusions of this are less scientific or more subject to control.
On the other hand, some studies must always be retrospective. For example, those who seek to determine the cause of heart defects would only identify those people with them and draw on this group to evaluate the cause. This is also called a study control study, and sometimes scientists would develop a second group of study participants who did not have heart defects and asked the same types of questions or conducted the same tests on both groups. This would allow comparison of data that, if found to be identified, would apparently not indicate a specific causal fraction.
Case control is still the appearance or retrospective study, because participants are those who have a specific result that has already occurred. In a way, it is actually more control than randomly exploring people who wouldHli have heart defects. The case of case control may show any features of common amounts that have heart defects and conclusions, could therefore be drawn on its cause if the correct factors or the correct questions are rated.