The phrase "a previous study concluded" is correct and usable in written English.
You can use it when referring to findings or results from an earlier research study in academic or scientific writing.
Example: "A previous study concluded that regular exercise significantly improves mental health."
Alternatives: "an earlier study found" or "a prior study determined".
A previous study concluded that pupils in vocational education had limited knowledge in the prevention of health risks at work.
A previous study concluded that a surface hardness based nondestructive test (NDT) method (rebound hammer test) is not reliable and that ultrasonic pulse velocity (UPV), which is a stress wave propagation based method, can be a useful tool for strength estimation of CMU (Sajid et al., 2016).
A previous study concluded that the pinch force necessary to avoid slippage is more than 3.3 N [12].
A previous study concluded that this was indeed so [12], we confirm this observation in our system in the current study using a more quantitative assay than was used previously.
A previous study concluded that mesh extrusion after prolapse surgery is more likely to occur with concomitant hysterectomy [ 22].
A previous study concluded that 30% of US women aged 50 years or older warrant consideration for OP treatment, based on their risk for fracture.
"I put myself at his disposal," said Luigi Garlaschelli, a chemist who closely examined the liquid in a previous study concluding that thixotropy, the property of certain gels to liquefy when they are shaken, might be one reasonable explanation.
However, a previous study concludes that time series model using fixed site's temperature has the same ability as spatiotemporal models using spatial temperatures to estimate temperature-mortality relationships [ 48].
Using a multivariable regression model, this previous study concluded that salary was a significantly influential factor among those who chose university hospitals, while non-economic factors, such as the number of supervising doctors, were influential among those who chose non-university hospitals.
At least one previous study concluded that the presence of EIMs is associated with a greater extent of disease [ 32].
This previous study concluded that PET was not superior to other imaging modalities in a cN0 neck work-up.
