The phrase 'major concern among' is correct and usable in written English.
You can use the phrase to refer to a general worry or problem shared by a group of people. For example: "The rising cost of living is a major concern among young families."
The flagging economy remains a major concern among those still on the fence, although a majority still thinks the Iraq war was right.
Weight gain is a major concern among smokers looking to quit.
Thermal comfort in the building is a major concern among the design expertise especially in tropical countries.
The office's activities, disclosed last Tuesday by The New York Times, caused major concern among Bush administration officials traveling with the president in Asia.
The question of financing a visit to the West has emerged as a major concern among East Germans now that they have been allowed to travel.
Negative equity is a major concern among policy makers because it can compel disillusioned borrowers to forsake their properties, contributing to the foreclosure problem.
And at the same time, better training has reduced weight-bearing injuries to backs and hips — major concern among female troops, he said.
Another major concern among Afghans and the international community is that the election is to take place just as NATO's combat mission here is drawing to a close.
A major concern among brokers and sales agents is that Westchester's high prices for single-family homes have encouraged potential buyers to look in Putnam County to the north, Mrs. Harburger added.
A major concern among policymakers is the risk of duplication and wasted effort if the work of the UN high-level panel and that of the open working group on the SDGs run along parallel tracks without meeting.
Another major concern among Arsenal fans is that the club's steady stream of revenues could end up paying off debt, or even financing other parts of Kroenke's business empire, instead of buying players.
