The phrase "a previous study has confirmed" is correct and usable in written English.
You can use it when referencing findings or conclusions from an earlier research study that supports your current argument or statement.
Example: "According to the latest research, a previous study has confirmed the effectiveness of this treatment in reducing symptoms."
Alternatives: "an earlier study has validated" or "a prior study has established".
A previous study has confirmed, by RT-PCR, that Serpinh1 is down regulated by CR in heart, liver and hypothalamus [ 26].
A previous study has confirmed that subchondral bone resorption was associated with early development of cartilage, which precedes significant cartilage thinning and subchondral bone sclerosis [ 5].
A previous study has confirmed that it is possible to record good-quality Raman spectra from prostatic tissue (Crow et al, 2002); this study evaluates the ability of Raman spectroscopy to differentiate between different prostatic pathologies in vitro.
However, a previous study has confirmed that acute administration of an NK1 receptor antagonist (RP 67580) does aggravate inattentiveness in this test (Weir et al., 2014), suggesting that a lack of functional NK1 receptors could contribute to this behavioural abnormality.
A previous study had confirmed the importance of suicidal ideation and further suggested that continued efforts should be outreached to the untreated individuals with suicidal ideation before the occurrence of attempts [ 20].
To date, no previous study has confirmed EREG and HOXB9 to be direct targets of miR-215-5p miR-215-5p miR-215-5p
Previous study has confirmed that the InGaAs SRL is effective at reducing the internal compressive strain in the InAs QDs, which is the primary cause of PL emission redshift [19].
Previous study has confirmed that participants who brushed their teeth twice or more per day had a high frequency of tooth wear [ 32].
As in physiological hypoxia, our previous study has confirmed that hypoxia chemically mimicking cobalt chloride also induces the formation of PGCCs in vitro [ 3].
The owner of each dog gave written consent to the procedures after being informed of the nature of the study, the comparator groups and the possibility that neither intervention would have a beneficial effect; our previous study had confirmed that transplantation of olfactory bulb-derived cell cultures was safe in dogs (Jeffery et al., 2005).
As previous study had confirmed diabetes and overweight/obesity increased the risk of dyslipidemia [ 22, 23].
