BOSTON, Massachusetts (Reuters) -- Faith and spirituality were cited most often by people over the age of 100 as the source of their longevity, according to a survey sponsored by a unit of UnitedHealth Group.

In a survey of 100 people between the ages of 100 and 104, 23 percent said faith rather than genes and good medical care were responsible for their long life.

Other factors given included hard work, a healthy diet and "living a good, clean life."

Sixty-one percent of those surveyed said there was nothing they would have done more of in their lives and 78 percent said there is nothing they would have done less.

About 13 percent said they wished they had traveled more, 9 percent said they wished they had worked less and 6 percent said they wished they had spent more time with their families.

The survey, conducted by Evercare which provide health plans to the disabled and chronically ill, indicated that 30 percent of centenarians considered raising a family as their most satisfying achievement while 20 percent valued mostly their careers.

Fewer high school students having sex, report says

ATLANTA, Georgia (Reuters) -- Fewer U.S. high school students are having sex, and the ones who do are less likely to have multiple partners, according to a report issued Thursday by the Centers for Disease Control and Prevention.

Parents marvel at seeing twins after surgery

SALT LAKE CITY, Utah (AP) -- A day after the 26-hour surgery that separated their 4-year-old conjoined daughters, Jake and Erin Herrin said they were overwhelmed by their reunion with Kendra and Maliyah.

Dads may suffer postpartum depression too

NEW YORK (Reuters) -- Women are not alone in suffering postpartum depression -- a "strikingly high" number of new fathers are affected as well, researchers reported this week.

Living with food allergies

Eight different foods including peanuts, which can cause particularly severe reactions, are responsible for 90 percent of all food allergies. For the 11 million Americans living with food allergies, dining out, whether at a restaurant or a friend's home, can cause more problems than it's worth. Unless you're standing over the chef in the kitchen, the fact is you have no guarantee that the food or foods to which you're allergic won't end up on your plate.

New test predicts lung cancer risk of spread

BOSTON, Massachusetts (Reuters) -- Researchers say they have developed a test that can predict with near certainty whether the most common form of lung cancer will return after surgery.