Computer-Assisted Personal Interviews (CAPI) were conducted in Greece using a stratified random sampling method to ensure national representativeness based on key demographic variables: gender, age, and level of urbanization, in accordance with the national population distribution. To enhance representativeness, quotas were applied for gender and prefecture of residence.

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Due to methodological constraints associated with the Computer-Assisted Web Interviewing (CAWI) mode, older age groups (65+) were underrepresented in the final sample; this limitation was pre-approved by CAWI administrators prior to data collection.

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Data collection began with a soft launch, followed by the main fieldwork conducted from December 7 to December 14, 2022. Fieldwork was carried out by Metron Analysis, a company in compliance with EU General Data Protection Regulation (EU-GDPR), ESOMAR guidelines, and relevant ISO standards.

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The final sample included N = 1,408 respondents, with a response rate of 93%. The average completion time for the questionnaire was 20 minutes. The survey instrument was jointly developed by RadoNorm and the Greek Atomic Energy Commission, which also funded the data collection. Data analysis was performed by SCK CEN, Belgium.

Data are available at: [DOI:10.20348/STOREDB/1179/1303]