The phrase "a previously reported study" is correct and usable in written English.
You can use it when referring to a study that has been mentioned or published before in another context or document.
Example: "The findings of a previously reported study indicate a significant correlation between diet and health outcomes."
Alternatives: "an earlier published study" or "a prior research report".
The synthesis of monodisperse Fe3O4 MNPs was based on a previously reported study [17].
Data from eight subjects, from a previously reported study [19], were used here.
More details of the drying experimental procedure can be found in a previously reported study [36].
Details of the spectral scattering property experiment can be found in a previously reported study by Chen et al. [38].
Comparison with a previously reported study in which the limb temperature was not controlled showed a statistically significant difference.
This is conceptually similar to a previously reported study for extrapolating bioactivities between species [32], and its application to M. tuberculosis [33].
Following a previously reported study, it is possible to prepare a nanocrystal-layered thin film for optical devices using the reprecipitation method [30].
The starting point was a previously reported study by Rosén and Gustafsson (2014) in which data aggregated to the country level was analysed.
The study was designed to extend retrospectively the analysis of a previously reported study on chronic bronchitis patients with acute exacerbations treated with amoxicillin clavulanic acid or matched placebo.
The research presented here represents the continuation of a previously reported study [11] with the aim to evaluate the clinical results at a 12-month follow-up, using the new DiPHOS-RM plate made of CFR-PEEK for the treatment of the distal radius fracture.
Organic loading rate in IFAS system at 5 loadings was 0.11 1.3 gCOD/L.d, hydraulic retention time was 10.8 h, and Input COD in 5 OLRs was 50 600 mg/L according to a previously reported study (Eslami et al. 2017a).
