女性40岁戒烟可多活十年_BEC初级作文

女性40岁戒烟可多活十年

The authors of the Million Women Study wrote: "Smokers lose at least 10 years of lifespan. Although the hazards of smoking until age 40 years and then stopping are substantial, the hazards of continuing are 10 times greater."

Women aged 50 to 65 were enrolled into the study, designed to investigate links between health and lifestyle, from 1996 to 2001.

Participants completed a questionnaire about living habits, medical and social factors and were re-surveyed three years later. Women were monitored for a total of 12 years on average, during which there were 66,000 deaths.

Initially, 20% of the women were smokers, 28% were ex-smokers, and 52% had never smoked.

Those who still smoked at the three year re-survey were almost three times more likely than non-smokers to die over the next nine years.

Both the hazards of smoking and the benefits of quitting were greater than previous studies had suggested, said the researchers.

Professor Sir Richard Peto, one of the co-authors at Oxford University, said: "If women smoke like men, they die like men - but, whether they are men or women, smokers who stop before reaching middle age will on average gain about an extra 10 years of life."

He added: "Both in the UK and in the USA, women born around 1940 were the first generation in which many smoked substantial numbers of cigarettes throughout adult life.

"Hence, only in the 21st century could we observe directly the full effects of prolonged smoking, and of prolonged cessation, on premature mortality among women."