Article

Green tea consumption and chronic atrophic gastritis: a cross-sectional study in a green tea production village.

Department of Public Health, School of Medicine, Fukuoka University, Japan.
Journal of Epidemiology (impact factor: 1.86). 10/2000; 10(5):310-6. pp.310-6
Source: PubMed

ABSTRACT Chronic atrophic gastritis (CAG) is well known as a precancerous lesion of the stomach, and Helicobacter pylori (H. pylori) infection increases the risk of CAG. While recent studies have reported that green tea consumption decreases the risk of gastric cancer, there has been no study analyzing the relationship between green tea consumption and the both risks H. pylori infection and CAG. We conducted a cross-sectional study on 636 subjects living in a farming village in Japan to examine the relationship among green tea consumption, H. pylori infection, and CAG. Smoking, alcohol drinking, consumption of four beverages, including green tea, and of five foods were investigated as lifestyle factors that may affect H. pylori infection and CAG. The measurement of H. pylori-IgG antibodies was used to define H. pylori infection, and serum pepsinogens were used to define of CAG. The unconditional logistic regression model was used for analyzing each odds ratio (OR). H. pylori infection was positively associated with the risk of CAG (OR = 3.73; 95% confidence interval [CI], 2.59-5.36). High green tea consumption (more than 10 cups per day) was negatively associated with the risk of CAG, even after adjustment for H. pylori infection and lifestyle factors associated with green tea consumption (OR = 0.63; 95% CI, 0.43-0.93). These results support the hypothesis that high green tea consumption prevents CAG.

0 0
 · 
0 Bookmarks
 · 
26 Views
  • Source
    Article: Green tea and gastric cancer risk: meta-analysis of epidemiologic studies.
    Yong Zhou, Ni Li, Wen Zhuang, Guanjian Liu, Taixiang Wu, Xun Yao, Liang Du, Maoling Wei, Xiaoting Wu
    [show abstract] [hide abstract]
    ABSTRACT: To evaluate the association between green tea consumption and the risk of gastric cancer. Electronic search of the Cochrane Library, MEDLINE, EMBASE and Chinese Bio-medicine Database, which have articles published between (1966 and 2006), was conducted to select studies for this meta-analysis. This meta-analysis included 14 epidemiologic studies, with a total number of 6123 gastric cancer cases and 134006 controls. The combined results based on all studies showed that green tea consumption was not associated with the risk of gastric cancer [odds ratio (OR)=0.98, 95% confidence interval (CI)=0.77-1.24]. The summary OR from all population-based case-control studies showed a minor inverse association between green tea consumption and risk of gastric cancer (OR=0.68, 95% CI=0.49-0.92), while no associations were noted from hospital-based case-control studies (OR=1.12, 95% CI=0.70-1.77) and cohort studies (OR=1.56, 95% CI=0.93-2.60). No associations were noted both in males (OR=1.10, 95% CI=0.76-1.60) and females (OR=0.99, 95% CI=0.64-1.51). The summary OR from seven studies suggest that the highest consumption level of green tea was more than 5 cups per day and no associations were noted (OR=0.99, 95% CI=0.78-1.27). The results of this meta-analysis indicated that there is no clear epidemiological evidence to support the suggestion that green tea plays a role in the prevention of gastric cancer.
    Asia Pacific Journal of Clinical Nutrition 02/2008; 17(1):159-65. · 1.13 Impact Factor
  • Source
    Article: Prevalence of chronic atrophic gastritis in different parts of the world.
    Melanie Nicole Weck, Hermann Brenner
    [show abstract] [hide abstract]
    ABSTRACT: Chronic atrophic gastritis (CAG) is a well-established precursor of intestinal gastric cancer, but epidemiologic data about its occurrence are sparse. We provide an overview on studies that examined the prevalence of CAG in different parts of the world. Articles containing data about the prevalence of chronic atrophic gastritis in unselected population samples and published until November 2005 were identified by searching the MEDLINE database. Furthermore, the references in the identified publications were screened for additional suitable studies. Studies comprising at least 50 subjects were included. Forty-one studies providing data on the prevalence of CAG in unselected population samples could be identified. CAG was determined by gastroscopy in 15 studies and by pepsinogen serum levels in 26 studies. Although results are difficult to compare due to the various definitions of CAG used, a strong increase with age, the lack of major gender differences, and strong variations between populations and population groups (in particular, relatively high rates in certain Asian populations) could be observed quite consistently. We conclude that CAG is relatively common among older adults in different parts of the world, but large variations exist. Large-scale international comparative studies with standardized methodology to determine CAG are needed to provide a coherent picture of the epidemiology of CAG in various populations. Noninvasive measurements of CAG by pepsinogen levels may be particularly suited for that purpose.
    Cancer Epidemiology Biomarkers &amp Prevention 07/2006; 15(6):1083-94. · 4.12 Impact Factor
  • Source
    Article: Beneficial effects of green tea--a review.
    Carmen Cabrera, Reyes Artacho, Rafael Giménez
    [show abstract] [hide abstract]
    ABSTRACT: Tea is the most consumed drink in the world after water. Green tea is a 'non-fermented' tea, and contains more catechins, than black tea or oolong tea. Catechins are in vitro and in vivo strong antioxidants. In addition, its content of certain minerals and vitamins increases the antioxidant potential of this type of tea. Since ancient times, green tea has been considered by the traditional Chinese medicine as a healthful beverage. Recent human studies suggest that green tea may contribute to a reduction in the risk of cardiovascular disease and some forms of cancer, as well as to the promotion of oral health and other physiological functions such as anti-hypertensive effect, body weight control, antibacterial and antivirasic activity, solar ultraviolet protection, bone mineral density increase, anti-fibrotic properties, and neuroprotective power. Increasing interest in its health benefits has led to the inclusion of green tea in the group of beverages with functional properties. However, although all the evidence from research on green tea is very promising, future studies are necessary to fully understand its contributions to human health, and advise its regular consumption in Western diets, in which green tea consumption is nowadays limited and sporadic.
    Journal of the American College of Nutrition 05/2006; 25(2):79-99. · 2.29 Impact Factor

Show more

Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

95% confidence interval [CI]
 
alcohol drinking
 
Chronic atrophic gastritis
 
cross-sectional study
 
define
 
define H. pylori infection
 
farming village
 
gastric cancer
 
green tea
 
green tea consumption
 
green tea consumption decreases
 
H. pylori
 
H. pylori infection
 
H. pylori-IgG antibodies
 
Helicobacter pylori
 
odds ratio
 
precancerous lesion
 
risks H. pylori infection
 
serum pepsinogens
 
unconditional logistic regression model