• Type of survey: continuous on a six-yearly basis.
  • Population scope: persons aged 18 to 69, both inclusive, living in main family households.
  • Geographical scope: the entire national territory.
  • Reference period of the results: the calendar year.
  • Reference period of the information: 12 months prior to the interview.
  • Sample size: 34,000 people.
  • Type of sampling: stratified two-stage sampling.
  • Collection method: web questionnaire (CAWI), computer-assisted telephone interview (CATI) and personal interview with electronic questionnaire on a portable computer (CAPI).

Methodology documents, questionnaires, classifications...