The first national survey of physician-assisted suicide found that 6 percent of the front-line doctors who responded have hastened patients' deaths with lethal injections or prescriptions.

The results suggest that while physician-assisted suicide does occur, it is rare and accounts for a small number of deaths in the United States.The survey was conducted in 1996, a year before Oregon became the first state to legalize doctor-assisted suicide. Doctors there can prescribe lethal drugs at the request of patients who have less than six months to live.

Dr. Diane Meier of Mount Sinai School of Medicine in New York City sent questionaires to 3,102 doctors, and 1,902 answered anonymously. The results were published in Thursday's New England Journal of Medicine.

The survey asked family practitioners, general internists, cardiologists and others who regularly care for the dying whether they had ever given lethal injections or had written prescriptions so patients could kill themselves.

Eighteen percent had gotten such requests. Five percent said they had given at least one lethal injection, and 3 percent had written a prescription. Some had done both, and overall about 6 percent said they had done one or the other.

The doctors said most of the patients asked for help ending their lives because of discomfort, pain, loss of dignity and fear of uncontrollable symptoms.

"This is really not happening very often," Meier said. "That's the most important finding. It's a rare event."

Among other findings:

- One-third of doctors said they would write prescriptions for deadly doses and one-quarter would give lethal injections if they were legal.

- Of the 10 specialties surveyed, general internists and those who specialize in care of the elderly and lung problems were most likely to help hasten patients' deaths.

- Jewish doctors and those with no religious affiliations were most likely to provide death assistance, while Catholic doctors were least likely.

- Opiates, such as morphine, were the drugs most often given to help patients die.