What is the methodology if my research is based on existing studies? Is there any possible methodology other than systematic review?
There are many other ways for you to do a research based on the published studies, other than a systematic review. For example, you can write a narrative review to summarize all the findings from the existing studies.
If you want to analyse the data from the published studies, you can do meta-analysis, which combines the results of multiple studies answering the same research question. You may read two of my articles for more ideas on how to conduct a meta-analysis.
Article Waist-to-Height Ratio, Body Mass Index and Waist Circumferen...
Article Subjective sleep quality, blood pressure, and hypertension: ...
You can also extract the data from published studies to answer your research question regarding to research methodology. For example, is reporting guidelines such as PRISMA and COSORT frequently used in nursing research? My friends Wilson and Kenneth worked on an analysis to see if the information of systematic review in nursing journal up-to-date.
Article Is the information of systematic reviews published in nursin...
Hope my answer helps you. Thanks.
Agree to what Dr Tahir suggested, however you must be very careful in choosing the right qualitative method, and of course systematic reviews of qualitative studies are also gaining popularity.
Go for systematic review. It is a tedious thing to do, so you will need a team to do it
If your objective is to synthesize results of existing studies and generate meanings then go for SE, you can perform meta-analysis only if you have a common measure (e.g. BMI) across included studies.
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