A team from the USA and China examined the role of green tea consumption on chronic gastritis and stomach cancer risks.
A population-based case-control study was conducted in Yangzhong, China, with 133 stomach cancer cases, 166 chronic gastritis cases, and 433 healthy controls.
|Odds ratios for drinking green tea:|
Stomach cancer: 0.52
Chronic gastritis : 0.49
|International Journal of Cancer|
Epidemiological data were collected by standard questionnaire and odds ratios were estimated using logistic regression models.
The researchers found that an inverse association was observed between green tea drinking and chronic gastritis and stomach cancer risks.
After adjusting for confounding factors, the odds ratios of green tea drinking were 0.52 and 0.49 for stomach cancer and chronic gastritis, respectively.
In addition, dose-response relationships were observed with years of green tea drinking in both diseases.
Veronica Wendy Setiawan, of the University of California, Los Angeles, said on behalf of the group, "The results provide further support on the protective effect of green tea against stomach cancer."
"This is the first time that green tea drinking was found to be protective against chronic gastritis, which may be of importance when designing intervention strategies for stomach cancer and its pre-malignant lesions in the high-risk population," she concluded.