The phrase "a former study of" is correct and usable in written English.
It can be used when referring to a previous research study or investigation on a particular topic.
Example: "In a former study of climate change impacts, researchers found significant evidence of rising sea levels."
Alternatives: "a previous study of" or "an earlier study of".
A former study of large scale anaerobic treatment of sludge from Björkborn industrial area demonstrated an increased genotoxic activity during treatment from induction factor 1.5 to induction factor 2.8 in the Umu-C assay[34].
Such a knowledge would minimise the need for a former study of the driving simulator validity and an afterwards study for verification of the results in real traffic conditions, which, in turn, would imply minimization of the research/education resources with the in parallel availability of valid results.
Moreover, in a former study of our research group, mirtazapine effectively reduced the overshoot of COR during the DEX/CRH test within 1 week of treatment in 40 depressed inpatients, but this attenuation of HPA axis activity occurred both in 5-week responders and nonresponders and was not related to clinical improvement [77].
This result partly challenges a former study of the older European population, using the SHARE [ 7].
This result is consistent with a former study of Soffer and Vazquez [ 10].
In a former study of us, we were selectively interested in the processing of pitch contours (Friedrich, Kotz, Friederici, & Alter, 2004).
This result is consistent with those of a former study on the reverse Warburg effect in which a luminal A breast cancer cell line, MCF-7, was used for in vitro study [ 6].
The results were coincident with those of a former study for the fermentability of glucose, xylose and their mixtures [ 27].
Also, the C1 and T relationships were plotted together with those of a former study to clearly show the detrimental effect of the sequential ground motion loading in terms of amplified displacement demands.
In a former study, QoL of outpatients in CAHMS was compared with students in the general population [ 11], the main instrument used was the Inventory of Life Quality for children and adolescents (ILC) [ 37] (see below).
Second, in a former study, the analysis of the photosynthetic carbon uptake was found to be similar in cold-acclimated plants of cold sensitive and tolerant accessions [ 49].
