The phrase 'the study involving' is correct and usable in written English.
It is typically used when you are introducing a particular study. For example: "The study involving 20 participants showed that the vaccine was effective in protecting against the virus."
The study, involving 5,100 patients, is the largest investigation of diabetes ever undertaken.
The study, involving 16,000 healthy women, was asking if the combination of estrogen and progestin could prevent disease.
The study, involving just 11 elephants, is hardly the last word on the subject.
The study, involving cancer patients who died in Massachusetts in 1996, found that a third of them received chemotherapy in the last six months of their lives.
After making the finding, the researchers immediately halted the part of the study involving patients taking Cardura and offered them another medicine.
The results in women with hysterectomies contrast with those from another arm of the study involving women who had not had hysterectomies and who took estrogen and progesterone.
In a letter suspending research there, Dr. Jonathan B. Perlin, deputy under secretary of veterans affairs, said the study, involving 87 patients, was not properly supervised.
The study involving 4,000 gamblers, which was commissioned by the Responsible Gambling Trust, revealed alarmingly high levels of problem gambling with fixed-odds betting terminals.
The study, involving more than 700 pancreatic cancer patients, was conducted by the Southwest Oncology Group, a cancer-research network sponsored by the National Cancer Institute.
The study, involving 80,000 participants, bears out the "rank income hypothesis" – your happiness is not determined by your absolute income but your income relative to others.
The study, involving Harvard University and the University of NSW, discovered a way of restoring the efficiency of cells, completely reversing the ageing process in muscles.
