The phrase "an indication of concern" is correct and usable in written English.
It can be used when referring to a sign or signal that suggests someone is worried or troubled about a situation.
Example: "Her silence during the meeting was an indication of concern regarding the project's progress."
Alternatives: "a sign of worry" or "a signal of unease".
There was also an indication of concern.
Both Texas and the organizations that have filed briefs on its side devote considerable energy in the briefs to trying to convince the justices that granting the case was a mistake, a choice of tactics that is usually an indication of concern that a decision that does reach the merits will be unfavorable.
After the phase-out of lead in gasoline in the year 2000, the mean blood lead level of children aged 0-14 years in China was 8.1 μg/dL, with 23.9% of children's having B-Pb greater than 10 μg/dL, the level established in 1991 as an indication of concern by the US Centers for Disease Control and Prevention CDCC) and adopted by the Ministry of Health of China in 2006 [ 19].
The title is an indication of this concern, as is Mr. Solondz's evocation of the ambient, interminable anxiety of the post-9/11 world.
In an indication of that concern, Azerbaijan last week signed an agreement to supply small amounts of natural gas to Russia, a promise that Ms. Jelenkovic said would not threaten the Nabucco pipeline.
[C3.] Ethics of Interviewing Terrorists A report on Al Jazeera, the Arab television network, offering new information on the Sept. 11 attacks, received little more than a cursory nod from American media organizations, an indication of the concern many journalists have had about the network's ties to Al Qaeda.
Even before the last death in May, in an indication of some concern among commanders, Lieutenant Ligsay was removed as the platoon's leader because, an officer told investigators, the platoon had been regularly killing dogs and had discharged a weapon without reason.
The retail bellwether has already given an indication of the concern over holiday spending, kicking off its seasonal sales earlier than usual.
So his appearance at the rally is being seen as an indication of real concern within the ANC over the April election.
The company says that about 18 million people responded to e-mail update requests but did not become members; 27 million neither replied nor joined -- possibly an indication of privacy concerns, even though Plaxo has pledged never to sell any information from the network.
As such, it was an indication of mounting global concern about the technology, as its adoption by military forces gathers apace.
