"confirm concerns" is correct and usable in written English.
You can use it to express that you want to have confirmation that someone has expressed anxieties or worries that are valid. For example, "I need to confirm concerns that this project is at risk of being delayed."
The results confirm concerns about the pension funds.
The raids appeared to confirm concerns in several West European countries that large-scale laundering of money obtained illegally in Russia continues through seemingly legitimate businesses.
The episode seemed to confirm concerns by some within the Co-op over how its management was responding to recent crises.
The president's action seemed to confirm concerns in the field that Dr. Venter's bold claims would stir public fear and lead to burdensome regulation.
The findings confirm concerns raised in the commission's final report, published earlier this year, which concluded: "Schools cannot be expected to do it all, yet many hea teachers are feeling unsupported by Camhs.
The report by the Financial Stability Board appeared to confirm concerns among policy makers that shadow banking is set to thrive beyond the reach of a regulatory net that has been tightening around conventional banking.
"This evaluation confirmed concerns with the scientific rationale, presentation and language, which were not adequately addressed during peer review.
One of Britain's largest clothing retailers confirmed concerns about consumer spending on Wednesday when the company said there was a "noticeable cooling" in demand recently.
The report largely confirms concerns first raised in May by a study written by Dr. Steven Nissen, a renowned cardiologist from the Cleveland Clinic, and published in The New England Journal of Medicine.
The figures show that appeals in England, Wales and Northern Ireland have more than doubled in the past three years, confirming concerns from school leaders about a continued deterioration in the quality of marking.
Representative Frank R. Wolf, Republican of Virginia, who ordered the report for the House Appropriations Subcommittee on Transportation, said the timetable confirmed concerns raised in Congress about the tunnel dangers and the slow progress Amtrak had made in correcting them.
