What Types Of Clinical Trials Are There?
Clinical trials entail providing subjects something, according to the NIH. After that, the participants are observed repeatedly throughout the course of time. Clinical studies, on the other hand, don’t always entail any kind of intervention. Therefore, not all clinical investigations are clinical trials.
In order for a local regulatory body to get approval for the beginning of any clinical trial, researchers need to demonstrate that the protocols they use for their research are compliant with the legislation. This is done to guarantee the health and safety of the volunteers. After these criteria have been satisfactorily satisfied, the research project may finally get underway.
There is a wide variety of clinical research available. The following is a list of those types of clinical trials that are most likely to be encountered by you.
These are the two primary types of clinical investigations.
The quality of clinical investigations, as well as its execution and interpretation, are inextricably linked to the study design. To find answers to the various study issues, multiple research approaches are required. The two basic categories that best describe these various approaches are interventional studies and observational studies.
Interventional studies
Interventional investigations, which are clinical trials, require investigators to provide or do something. The purpose of this study was to determine whether or not administering testosterone to male dialysis patients will enhance their quality of life.
Observational studies
When doing observational studies, the researcher does not provide the participants with anything as part of the design of the experiment. However, as a part of their regular medical treatment, the participants in the study could get therapies. The protocol requires the investigators to gather data in order to evaluate the health outcomes of the participants. Consequently, ethical approval from the appropriate local ethics board is still necessary for observational research.
What kinds of clinical tests are available to choose from?
The exact goal that researchers have in mind might dictate the level of intricacy and design that goes into clinical trials.
Clinical trials using random assignment
Randomized controlled trials (RCTs) assign participants to a control or intervention group. The group serving as the control either does not get any intervention at all or receives an intervention that is functionally equivalent but accomplishes nothing. An RCT may evaluate at least two different treatments at the same time.
Randomized controlled trials are the most reliable method for establishing a causal link between an intervention and the result of interest. Because of randomization, the only variation between groups is the intervention. The impact of the intervention may be inferred from the observed differences in the outcomes. Because of this, they are located rather high on the pyramid of evidence.
Different kinds of clinical research and clinical tests are available.
RCTs are considered the gold standard since they include the recruitment of large groups of people and a comparison between the intervention and no intervention.
Multiple-stage, multiple-arm trials (MAMS)
The MAMS, or multiple-arm (https://pubmed.ncbi.nlm.nih.gov/32176282/ testing – PubMed (nih.gov)), trials were developed in order to speed up the process of developing new drugs. MAMS studies often include many groups, including the following:
- A group that serves as a control that remains the same throughout the whole of the experiment.
- A number of different treatment groups were examined
It’s possible that throughout the course of a MAMS study, researchers may discover that some therapies are not as beneficial as they had previously believed. These groups may be altered, or even closed off to new patients, in order to concentrate the patients’ attention on medications that are more beneficial. There is also the possibility of adding additional treatment groups or subgroups.
MAMS studies are designed to answer numerous questions at the same time, without the need to prepare another clinical study to evaluate new therapies. As a result, time is saved, and the process of developing new drugs is sped up.
Studies in the form of pilot projects and feasibility studies
Before a bigger clinical trial is carried out, a pilot study or a feasibility study is often carried out first. These studies are comparable, although they were conducted with distinct goals in mind.
Pilot studies
Pilot studies are preliminary research that are conducted on a smaller scale to assist in the design and execution of bigger clinical trials. Click here to read more on pilot studies.
These preliminary investigations are carried out in advance of the primary study to evaluate the validity of the study design and contribute to the answering of specific research questions. It is common practice to include a summary of the findings from pilot studies inside the findings of a larger clinical study.
Studies of feasibilities
When researchers question themselves, “Can we really carry out our primary clinical trial?”, they undertake feasibility studies. After determining the need for a larger clinical trial, researchers conduct feasibility studies. The timing, goals, and expenses of the planned clinical trial may all be evaluated via the use of a feasibility study, which can also uncover possible intervention changes.
