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J Epidemiol:研究证实草本茶降低结肠癌风险

来源:生物谷 2014-05-19 10:33

2014年5月17日讯 /生物谷BIOON/--一项最新研究证实:喝草本茶,甚至一周只有一次,能降低结肠癌的风险。研究探讨了热咖啡,冰咖啡,草本茶,红茶对近侧结肠,末端结肠和直肠癌风险的影响。Curtin大学林Fritschi教授说:草本茶与罹患肠癌风险降低之间的关系是他们最有意义的发现,但可能需要进一步的调查。

草本茶降低患癌症风险之间的关系需要在其他研究中进一步得到证实,Fritschi教授说:喝茶的人患癌症风险降低的可能原因之一是,总体而言是他们有一个健康的饮食。但茶并非实际的保护因素,此外,草本茶包含多种类型例如薄荷,甘菊等。

多变量Logistic回归方法分析红茶(有或无奶),绿茶,草本茶,热咖啡,冰咖啡,牛奶与大肠癌的相关性。红茶(有或无奶),绿茶,不含咖啡因的咖啡和牛奶与结直肠癌风险并没有显著相关性。

热咖啡与远侧结肠癌风险可能增加相关联,然而,这一发现与先前的文献不一致。冰咖啡和直肠癌风险增加之间的关联是相互矛盾的,这可能是一个偶然的发现。Fristchi教授说,虽然在他们的研究中,部分是不确定的,但它可作为即研究癌症风险和饮料消耗之间关系的起点。(生物谷Bioon.com)

Tea, coffee, and milk consumption and colorectal cancer risk

Green CJ, de Dauwe P, Boyle T, Tabatabaei SM, Fritschi L, Heyworth JS.

BACKGROUND:
Data regarding the effects of tea, coffee, and milk on the risk of colorectal cancer are inconsistent. We investigated associations of tea, coffee, and milk consumption with colorectal cancer risk and attempted to determine if these exposures were differentially associated with the risks of proximal colon, distal colon, and rectal cancers.
METHODS:
Data from 854 incident cases and 948 controls were analyzed in a case-control study of colorectal cancer in Western Australia during 2005-07. Multivariable logistic regression was used to analyze the associations of black tea (with and without milk), green tea, herbal tea, hot coffee, iced coffee, and milk with colorectal cancer.
RESULTS:
Consumption of 1 or more cups of herbal tea per week was associated with a significantly decreased risk of distal colon cancer (adjusted odds ratio, 0.37; 95% CI, 0.16-0.82; PTrend = 0.044), and consumption of 1 or more cups of iced coffee per week was associated with increased risk of rectal cancer (adjusted odds ratio, 1.52; 95% CI, 0.91-2.54; PTrend = 0.004). Neither herbal tea nor iced coffee was associated with the risk of proximal colon cancer. Hot coffee was associated with a possible increased risk of distal colon cancer. Black tea (with or without milk), green tea, decaffeinated coffee, and milk were not significantly associated with colorectal cancer risk.
CONCLUSIONS:
Consumption of herbal tea was associated with reduced risk of distal colon cancer, and consumption of iced coffee was associated with increased rectal cancer risk.

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