An aspirin(阿司匹林) a day keeps the doctor away...(原俗语为： An apple a day keeps the docter away.)
Dr. Tim Johnson discusses evidence of a daily dose(药剂量) of aspirin's benefits.That's not the saying, but doctors have agreed, for about a generation, that an aspirin a day is good for you. It may reduce the risk of heart attacks or strokes(中风) by 20 percent or more.
But at what age should you start? How much should you take? And is it different for men than women? The answers -- coming from different studies, interest groups, and insurance companies, were all over the map.
Now, the U.S. Preventive Services Task Force(美国预防卫生服务工作组), an independent panel(专门小组) convened(召集) by the Department of Health and Human Services, has published guidelines it says should end the confusion.
The key points:
1. Men should start a daily aspirin at age 45, mainly to protect against heart attacks.
2. Women should start at 55, mainly to protect against stroke.
3. For both sexes, a baby aspirin -- typically 81 milligrams a day -- will do the job. There is no evidence that a larger dose makes a difference.
4. And both sexes should stop by age 80, unless their doctors say otherwise. As you get older, there's a greater risk of bleeding in the brain or the digestive(消化的) system -- a risk that is small but can be fatal in some cases.
General guidelines do not always generate much response, but these are on a hot topic.
Doctors said they come from an influential group, and they're being published in a widely-read medical journal, the Annals of Internal Medicine.
Numbers are hard to come by, but few people who would benefit from a daily baby aspirin appear to be taking one. In one recent study, only 16.6 percent of those eligible(合格的) were taking aspirin.
If they start, doctors say their risk of heart attack or stroke will drop by about 20 percent.
"People may ask themselves, 'Am I at risk for a heart attack or a stroke,'" said Dr. Randal Thomas, director of cardiovascular(心血管的) health at the Mayo Clinic in Minnesota. "If you're above age 45 and male, if you're above age 55 and female, the answer is most likely yes, and you will most likely benefit from taking a small dose of aspirin a day."