LONDON, England (Reuters) -- Working long hours has a greater negative impact on women than men because it makes them more likely to smoke, drink coffee and eat unhealthy food.

Both sexes consume less alcohol if they spend more time working, researchers said this week, but toiling extra hours makes women crave unhealthy snacks.

"Women who work long hours eat more high-fat and high-sugar snacks, exercise less, drink more caffeine and, if smokers, smoke more than their male colleagues," said Dr. Daryl O'Connor, a researcher at Britain's Leeds University.

"For men, working longer hours has no negative impact on exercise, caffeine intake or smoking," O'Connor said in a statement released by the Economic and Social Research Council, which funded his study.

O'Connor's team of scientists were studying the impact of stress on eating habits. They looked at what causes stress at home and at work and how people react to it.

The results show that one or more stressful events such as making a presentation, a meeting with the boss or missing a deadline was linked to eating more between-meal snacks and fewer or smaller portions of fruits and vegetables.

"Stress disrupts people's normal eating habits," he said.

The people who were most vulnerable were so-called emotional eaters.

"These individuals have higher levels of vulnerability and tend to turn to food as an escape from self-awareness," O'Connor said.

"When they feel anxious or emotionally aroused or negative about themselves, they try to avoid these negative feelings by turning their attention to food."

Study: New drug prevents breast cancer, raises other risks

(AP) -- Women with heart disease or a high risk for it would trade one set of odds for another if they took the drug raloxifene to try to prevent breast cancer, a new study suggests.

Report: 1 in 8 babies born prematurely

WASHINGTON (AP) -- Specialists called Thursday for more early ultrasound exams during pregnancy and tighter guidelines for infertility treatment as key first steps in battling a growing problem: One in eight babies now is born prematurely.

'FDA issues warning on 'natural' impotence pills

WASHINGTON (AP) -- Some products touted on the Internet as natural alternatives to impotence drugs such as Viagra illegally contain the same active ingredients as the prescription medicines, the Food and Drug Administration says.

Schools go on health kick as federal law takes hold

ST. PAUL, Minnesota (AP) -- They're promising to keep closer tabs on student lunch trays, pull sugary treats from vending machines and classroom celebrations and encourage more pulse-raising activities during the school day.

Canada confirms seventh case of mad cow disease

(CNN) -- Canadian health officials said Thursday that tests have confirmed a seventh case of mad cow disease, in a 50-month-old dairy cow from Alberta.