The phrase "a previous study recommended" is correct and usable in written English.
It can be used when referring to suggestions or findings made by an earlier research work.
Example: "A previous study recommended implementing more sustainable practices in the industry to reduce environmental impact."
Alternatives: "an earlier study suggested" or "a prior study advised".
The previous study recommended excluding outliers from cluster formation, but including them in the interpretation of patient clusters.
Previous studies recommended that a B/D ratio of about 2 be used for the design of the ADAS elements in all stories of the buildings.
To guarantee the performance of the generated RF model, previous studies recommended to use a relative large mtry in growing the trees of a RF when dealing with high dimensional data such as SNP data in GWA studies.
Previous studies recommended the oral insertion of a supraglottic instrument and tracheal intubation through this instrument at the onset of airway obstruction [2, 5, 7]; however, these procedures were not attempted for the present patient.
The previous studies recommended that the regional distribution of vulnerable habitats and biota be mapped to assess the environmental sustainability of trawling and the efficacy of management regimes [138].
Previous studies recommended performing 5 7 passes of EUS-FNA for pancreatic masses [ 29– 31].
Previous studies recommended different cut-off of RI (0.6, 0.7 and 0.8) and PI (1.1, 1.5 and 1.6) for distinguishing metastatic and reactive nodes with different sensitivities (RI, 47 81%; PI, 55 94%) and specificities (RI, 81 100%; PI, 97 100%).
WHO 2003 guidelines and French guidelines and previous studies recommended that TB patients living with HIV should receive the same TB treatment duration as HIV-seronegative patients[ 5- 7, 11].
Previous studies recommend a monitoring of subclinical or minor depression for people with type 2 diabetes [ 33– 33].
Previous studies recommend choosing a DLNM that is easy to interpret from an epidemiological perspective (Armstrong 2006; Gasparrini et al. 2010).
