The phrase "according to the same study" is correct and usable in written English.
It can be used when referencing information or findings from a specific study that has been previously mentioned in the text.
Example: "The results were surprising; according to the same study, the majority of participants preferred option A over option B."
Alternatives: "as stated in the same study" or "based on the same research".
According to the same study, the United States had the world's most expensive health-care system.
According to the same study, by 2030 "up to 325 million extremely poor people will be living in the 49 most hazard-prone countries" in the world.
During the past decade, according to the same study, there has been a three-fold increase in the total number of UK teenagers self-harming.
According to the same study, thirteen per cent of female Californian weed users surveyed had stopped drinking entirely, replacing alcohol with cannabis.
A university education makes women "two to four times (depending on age) more likely to retain their surname", according to the same study.
According to the same study, induction rates are higher in white women and those being delivered by doctors in private practice.
In Spain, 92 percent of Gypsies live in standard apartments or houses, according to the same study.
According to the same study by the Vienna University of Technology, old T-shirts or dress shirts produce less navel fuzz than brand new T-shirts.
Did the injunction against intercourse push teenagers to try oral sex (as half of teenage boys have, according to a federally financed study) or anal sex (as 10percentt of boys have, according to the same study)?
According to the same study by the Institution for Transport Policy Studies, motorcycle usage will have decreased to 63% by 2050 due to the steady rise in car ownership.
Nor is the system effective for injured patients — according to the same study, 54 cents of every dollar paid in malpractice cases goes to administrative expenses like lawyers, experts and courts.
