The phrase "a previous study described" is correct and usable in written English.
You can use it when referring to findings or information that were detailed in an earlier research study.
Example: "A previous study described the effects of sleep deprivation on cognitive performance."
Alternatives: "an earlier study outlined" or "a prior study detailed".
A previous study described the development of TAC for the detection of respiratory viral and bacterial pathogens; the assay was evaluated against well-characterized analytical materials and a limited collection of human clinical specimens.
Using microarrays, a previous study described differential gene expression profiles of EHEC O157∶H7 in response to bacterial growth in the presence of erythrocytes [22].
A previous study described a subset of microtubules that are derived from the trans Golgi network that preferentially orient toward the leading edge of motile cells [23].
A previous study described that there are 69 genes unique to Salmonella [ 39].
A previous study described a low muscle mass in 39% of the patients with mCRC [ 8].
As a previous study described, rapidly increasing economic development has led to unhealthy lifestyles [ 71].
A previous study describing a truncating mutation in BRCA2 in an FA-B cell line led to the suggestion that FANCB and BRCA2 were the same gene4.
So far, researchers have learned that different drugs create different patterns in the brain, says [Emery Brown, MD, PhD, co-author of a previous study describing what researchers know and don't know about anesthesia.] For example, propofol - one of the most widely-used anesthetics - is a very potent drug and initially puts the brain into a state of excitation.
Although a previous study describing a transgenic mouse carrying a Y99C mutant bovine GCAP1 transgene also showed significant rod degeneration, this can be attributed to the fact that the transgene was expressed predominantly – if not exclusively – in rods [16].
