"rationale behind this study" is a correct and usable phrase in written English.
You can use it when you need to explain the reasons for why the study is being conducted, as in the following example: "The rationale behind this study is to determine how effective this new medication is at treating this condition."
HMMs proved to be effective machine learning tools for sequential and correlated data and this is the main rationale behind this study.
The rationale behind this study was to demonstrate that genipin crosslinking can improve and maintain the stability of chitosan/poly-l-lysine (PLL) blends.
The rationale behind this study was to demonstrate that presence of small quantities of Zn2+ ions doped in HA nanoparticles can improve biocompatibility of PCL/Ch blends.
The rationale behind this study amendment will be described further in the discussion.
The rationale behind this study was based on the premise that both parasites and humans express similar kinase enzymes.
The rationale behind this study is that PubMed retrieval performance highly depends on the usage of search tags.
The rationale behind this new study was that SRL172 in the tumour or in the pleural cavity could result in an increased concentration of the immunologically active compound in the vicinity of the tumour, thus causing an inflammatory reaction which could potentiate the anti-tumour killing at the tumour site.
This confirms the main rationale behind the study: An early diagnosis and short delay between the first onset of symptoms and initiation of treatment correlates with substantially lower medical service utilization.
This paper discusses the rationale behind the study design, and considers the challenges but necessity of data collection within a non-institutionalised adult population, in order to address the study aims.
This paper describes the methods and rationale behind the study and the general characteristics of the sample.
A strong message from both Grozny and Kitchanga was the importance of explaining the rationale behind the study design to ensure the community understood this well.
