CHICAGO — A survey of religion in medicine found that most U.S. doctors believe in God and an afterlife, a surprising degree of spirituality in a science-based field, researchers say.

In the survey of 1,044 doctors nationwide, 76 percent said they believe in God, 59 percent said they believe in some sort of afterlife, and 55 percent said their religious beliefs influence how they practice medicine.

"We were surprised to find that physicians were as religious as they apparently are," said Dr. Farr Curlin, of the University of Chicago's MacLean Center for Clinical Medical Ethics.

"There's certainly a deep-seated cultural idea that science and religion are at odds," and previous studies have suggested that fewer than half of scientists believe in God, Curlin said.

A previous survey showed about 83 percent of the population say they believe in God.

But while medicine is science-based, doctors differ from scientists who work primarily in a laboratory setting, and their direct contact with patients in life-and-death situations may explain the differing views, Curlin said.

The study is based on responses to questionnaires mailed in 2003. It is to appear in an upcoming issue of the Journal of General Internal Medicine and was released online to subscribers earlier this month.

Dr. J. Edward Hill, president of the American Medical Association, said religion and medicine are compatible, as long as doctors do not force their own beliefs on patients.

Belief in "a supreme being ... is vitally important to physicians' ability to take care of patients, particularly the end-of-life issues," said Hill, a physician in Tupelo, Miss.

.