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Even Light Alcohol Consumption Linked to Higher Cancer Risk in Japan

In a CANCER study conducted in Japan, even light to moderate alcohol consumption was associated with elevated cancer risks.


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In a study conducted in Japan, even light to moderate alcohol consumption was associated with elevated cancer risks. In the study published early online in CANCER, a peer-reviewed journal of the American Cancer Society, the overall cancer risk appeared to be the lowest at zero alcohol consumption.

Although some studies have linked limited alcohol consumption to lower risks of certain types of cancer, even light to moderate consumption has been associated with a higher risk of cancer overall. To study the issue in Japan, Masayoshi Zaitsu, MD, PhD, of The University of Tokyo and the Harvard T.H. Chan School of Public Health, and his colleagues examined 2005–2016 information from 33 general hospitals throughout Japan. The team examined clinical data on 63,232 patients with cancer and 63,232 controls matched for sex, age, hospital admission date, and admitting hospital. All participants reported their average daily amount of standardized alcohol units and the duration of drinking. (One standardized drink containing 23 grams of ethanol was equivalent to one 180-milliliter cup (6 ounces) of Japanese sake, one 500-milliliter bottle (17 ounces) of beer, one 180-milliliter glass (6 ounces) of wine, or one 60-milliliter cup (2 ounces) of whiskey.

Overall cancer risk appeared to be the lowest at zero alcohol consumption, and there was an almost linear association between cancer risk and alcohol consumption. The association suggested that a light level of drinking at a 10-drink-year point (for example, one drink per day for 10 years or two drinks per day for five years) would increase overall cancer risk by five percent. Those who drank two or fewer drinks per day had an elevated cancer risk regardless of how long they had consumed alcohol. Also, analyses classified by sex, drinking/smoking behaviors, and occupational class mostly showed the same patterns.

The elevated risk appeared to be explained by alcohol-related cancer risk across relatively common sites, including the colorectum, stomach, breast, prostate, and esophagus.

“In Japan, the primary cause of death is cancer,” said Dr. Zaitsu. “Given the current burden of overall cancer incidence, we should further encourage promoting public education about alcohol-related cancer risk.”

Additional Information

Full Citation: “Light to moderate amount of lifetime alcohol consumption and risk of cancer in Japan.” Masayoshi Zaitsu, Takumi Takeuchi, Yasuki Kobayashi, and Ichiro Kawachi. CANCER; Published Online: December 9, 2019 (DOI: 10.1002/cncr.32590).
URL Upon Publication: http://doi.wiley.com/10.1002/cncr.32590

About the Journal
CANCER is a peer-reviewed publication of the American Cancer Society integrating scientific information from worldwide sources for all oncologic specialties. The objective of CANCER is to provide an interdisciplinary forum for the exchange of information among oncologic disciplines concerned with the etiology, course, and treatment of human cancer. CANCER is published on behalf of the American Cancer Society by Wiley and can be accessed online.

About Wiley
Wiley drives the world forward with research and education. Through publishing, platforms and services, we help students, researchers, universities, and corporations to achieve their goals in an ever-changing world. For more than 200 years, we have delivered consistent performance to all of our stakeholders. The Company’s website can be accessed at www.wiley.com.


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