Within the GENACIS project three questionnaires were established to achieve comparable measures across all participating countries.
Core (basic questionnaire including all central items)
Expanded Core (based on the core questionnaire but including additional question aiming to provide a more detailed description of respondents' social environment and drinking circumstances)
Sampling Design Questionnaire (questionnaire on survey design and sampling procedure, providing details on e.g. response rate, alcohol-related measures like usual drink size and alcohol content of beverages)