研究稱每日飲咖啡可降低死亡風險
More good news on coffee: A large study has found that drinking coffee is associated with a reduced risk of dying from heart disease and certain other causes.
現在又傳來了有關咖啡的好消息：一項大規模的研究發現，喝咖啡的行爲與死於心臟病等某些原因的風險降低之間存在正相關。
Researchers followed more than 200,000 doctors and nurses for up to 30 years. The participants had periodic physical examinations and completed questionnaires on diet and behavior, including their coffee habits. The study is in Circulation.
在長達30年的時間裏，研究人員追蹤了20多萬名醫生和護士的情況。參與者定期體檢，並填寫飲食和行爲方面的問卷，其中包括他們喝咖啡的習慣。這項研究成果發表在了《循環》雜誌(Circulation)上。
Compared with abstainers, nonsmokers who drank a cup of coffee a day had a 6 percent reduced risk of death, one to three cups an 8 percent reduced risk, three to five cups a 15 percent reduced risk, and more than five cups a 12 percent reduced risk. There was little difference whether they drank caffeinated or decaffeinated coffee. The association persisted after controlling for age, alcohol consumption, B.M.I. and other health and diet factors.
在不吸菸的人羣中，和不喝咖啡的人相比，每天喝一杯、一到三杯、三到五杯和五杯以上咖啡的人的死亡風險分別降低了6%、8%、15%和12%。不管喝的咖啡中是否含咖啡因，結果幾乎沒有差別。在對年齡、酒精攝入量、體重指數和其他健康及飲食因素進行了控制後，這種相關性依然存在。
Coffee drinking was linked to a reduced risk of death from heart disease, stroke, diabetes, neurological diseases and suicide, although not from cancer.
喝咖啡和死於心臟病、腦卒中、糖尿病、神經系統疾病和自殺的風險的降低有關係，但不影響死於癌症的風險。
The association was not apparent in smokers, probably because death from smoking-related causes overwhelms the positive effect of coffee drinking.
這種關聯在吸菸人羣身上並未觀察到，很可能是因爲，與吸菸有關的死亡，大大蓋過了喝咖啡帶來的積極效果。
While the findings are encouraging, the lead author, Dr. Ming Ding, of the Harvard School of Public Health, cautioned, “Our study is observational, so it’s hard to know if the positive effect is causal or not.”
儘管相關結果鼓舞人心，但論文的第一作者、哈佛大學公共衛生學院(Harvard School of Public Health)的丁明告誡，“我們的研究是觀察性質的，所以很難確定這種積極效果是否屬於因果關係。”
