NEW YORK — A survey brought some good news for faith leaders alarmed by the spike in the number of Americans who say they have no ties to a particular religion.

U.S. adults who continue to identify with a faith group, about 77 percent of all Americans, have largely stayed as religiously engaged as they were seven years ago, according to the Pew Research Center, evidence of a solid core of committed faithful who remain a bulwark against secularization.

Two-thirds of religiously affiliated adults said last year faith was very important to them and they prayed daily, nearly unchanged from 2007, the last time Pew conducted its U.S. Religious Landscape Study. About 6-in-10 said they attend worship services at least once or twice a month, a rate similar to years before, and nearly all said they believed in God, although the study found a slight dip in the percentage who said so with absolute certainty.

By other measures, the religiously affiliated are more devoted than they were years before. A higher percentage say they regularly read scriptures, participate in small prayer or study groups and share their faith with others.

Pew released the findings, based in part on a 2014 telephone survey of more than 35,000 people, as religious leaders are grappling with the shifting makeup of American religious life, including the end of what was once a Protestant majority and shrinking membership in denominations.