For data collected from 2000, education is coded to 11 groups. Formerly data were coded to 9 groups. The sample of dwellings covers all 79 districts of the Slovak Republic. All persons aged 15 years and over are covered, excluding institutionalized persons, foreign citizens on short-term stay, and persons residing abroad. The survey is quarterly, with interviews conducted continuously through the quarter.
Selected dwellings remain in the survey for five consecutive quarters.
Fieldwork is undertaken continuously throughout the year. A permanent survey organization conducts the survey. Interviewers are staff of regional statistical offices. The total nonresponse rate is 6 percent.