The phrase "a study that tracked" is correct and usable in written English.
It can be used when referring to research that monitored or followed specific variables or subjects over time.
Example: "The study that tracked the participants' health outcomes revealed significant improvements in their overall well-being."
Alternatives: "a study that monitored" or "a study that followed".
The subjects in his study were women 45 and older who were healthy and already participating in a study that tracked the development of heart disease.
A study that tracked the happiness of 15,000 people for three years found that their mood was lifted by aesthetically pleasing settings.
Butler Hospital, affiliated with Brown University in Providence, R.I., recently completed a study that tracked 44 alcoholics and found that outpatient treatment and 12 weeks of aerobic conditioning increased the likelihood of their remaining sober.
Last year, a study that tracked almost 15,000 male physicians for a decade reported no differences in cancer or heart disease rates among those using vitamins E and C compared with those taking a placebo.
In their book "Academically Adrift: Limited Learning on College Campuses," sociologists Richard Arum and Josipa Roksa described a study that tracked more than 2,000 students at four-year colleges.
The findings are part of a study that tracked the academic performance of more than 21,000 students who applied for ninth grade admission at 105 small high schools, mainly in Brooklyn and in the Bronx, from 2005 to 2008.
For nearly two decades, she has been conducting a study that tracks long-term changes in the brain.
The next step would be a study that tracks public health professionals before and after their training, says Daniel Wikler, a bioethicist at Harvard School of Public Health in Boston, who helped Ransohoff design the medical dilemmas.
The economist Dean Karlan conducted a research study that tracked a group of smokers who publicly committed to giving up, and who agreed to forfeit six months' worth of cigarette money if they failed.
In 2013, Emily PutnandHornstein and a team of researchers from the University of Southern California and the University of California-Berkeley released a groundbreaking study that tracked what happens to the children of young mothers who had experienced the child protection system in Los Angeles.
That is the finding of a new study that tracked the physical condition of 5,000 children as they made their way through kindergarten and first grade.
