• The Who, What, Where, When and Sometimes, Why.
  • Table 3: Alcohol and breast cancer risk

  • † In the U.S., there is an average of 13 grams (g) of alcohol in a bottle or can of beer, 11 g in a glass of wine and 15 g in a shot of whiskey. Relative risk categories are based on the amount of alcohol in a glass of wine.
  • ‡ Categorized as 15 or more drinks per week.
  • § Average alcohol intake over follow-up time.
  • ║ The number of drinks per day was estimated from the number of grams of alcohol given in the study.
  • ¶ Results showed that 2 to 4 drinks of alcohol per day increased breast cancer risk among white, African American, Japanese American and Latina women, but not among Native Hawaiian women.
  • ** Estimated from study dates. 
  • †† Categorized as 7 or more drinks per week.
  • ‡‡ Results also showed that increasing alcohol use by 10 grams (about one drink) per day increased the overall risk of breast cancer as well as the risk of hormone receptor-positive tumors (relative risk 1.07 (1.01-1.14) and 1.11 (1.03-1.20), respectively).
  • §§ Results also showed that compared to non-drinkers, women who drank 10 or more grams of alcohol per day had an increased risk of estrogen receptor-positive breast cancers.
  • ║║ Categorized as 1 or fewer drinks per day.  
  • ¶¶ Categorized as 3 drinks per day.
  • References

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Updated 05/07/15

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