Additional file 2: of Estimating average alcohol consumption in the population using multiple sources: the case of Spain

Methodological characteristics of main population surveys providing data to calculate self-reported alcohol consumption among population aged ≥15, and calculation algorithms, Spain, 2001–2011. The characteristics considered are: year of the survey, effective sample size, mode of questionnaire administration, questions on frequency of consumption, questions on number of standard drinks, response rate, and percent of missing values for quantity-frequency questions. (DOCX 15 kb