4a. During that 2-week period, on how many days did you drink any beer?

Let's talk about the 2-week period ending the day you had your last drink. Please include that last day.

10a. During that 2-week period, on how many days did you drink any beer?

11a. During that 2-week period, on how many days did you drink any beer?

Read to respondent:
Let's talk about the 2-week period ending with and including the day you had your last drink.
17a. During that 2-week period, on how many days did you drink any beer?