This decline was especially worrisome, union officials acknowledged, because the economy added 2.8 million jobs.

What has become especially worrisome in recent years is the increasingly unequal relationship between labor and capital.

Several immigrant workers said management used an especially worrisome tactic to keep the union out.

Especially worrisome, they said, is growing evidence that its members or supporters have infiltrated the army and police forces.

Especially worrisome, though, the study's authors say, is the increase in syphilis among blacks.

Though analysts anticipated the poor first-quarter results, several said the performance of the company's military business was especially worrisome.

That is especially worrisome because city and state budget problems are likely to result in diminished housing subsidies.

The new militancy has been especially worrisome to Christian leaders.

This is never wise, but especially worrisome in the early stages of a career.

Suitability questions about day trading are especially worrisome to regulators.