ASSESSMENT OF ALCOHOL INTAKE
On a baseline questionnaire, participants were asked how often, on average, they had consumed alcoholic
beverages, including beer (1 glass, bottle, or can), red wine (4oz glass), white wine (4oz glass), and liquor
(1 drink or shot), during the previous year. Nine possible responses ranging from “never or less than once
per month” to “6+ per day” were recorded. Alcohol intake was calculated according to the alcohol content in
each beverage, assuming ethanol of 13.2 g for 360 mL (12 oz) of beer, 10.8 g for 120 mL (4 oz) of red or
white wine, and 15.1 g for 45 mL (1.5 oz) of liquor. Among health care professionals similar to the WHS
cohort, the correlation of alcohol intake estimated from dietary records with questionnaire data was 0.90 for
total alcohol intake, 0.81 for beer, 0.83 for wine, and 0.80 for liquor intake