Weekly alcohol consumption was evaluated by assessing the different types of beverage consumed (for example, wine or beer) and their alcohol content (such as 10% wine, 12% wine, 4% beer, or 5% beer). Participants’ present alcohol intake, defined by the level of consumption during the week before examination, was evaluated by interview using a questionnaire that was administered, as far as possible, along with the food frequency questionnaire. If, for some reason, the alcohol consumption for that week appeared to differ from the usual consumption of the participant, the interviewer had to refer to an earlier week that corresponded to a more usual or normal intake. The interview covered consumption during each normal day of the week, including at meals and between meals, for the following times: before breakfast; breakfast; morning; lunch; afternoon; dinner; evening; and night. Age at which regular alcohol consumption began was recorded.
