Table 2.
Main characteristics of the national HLS19 surveys.
| Country | Languages | Type of Data Collection |
Sampling Procedure | Item Set | n |
n for IRT 4 |
|---|---|---|---|---|---|---|
| Austria (AT) | German | CATI | Multi-stage random sampling | Q12 | 2967 | 2471 |
| Belgium (BE) | Dutch, French | CAWI | Quota sampling | Q22 | 1000 | 1000 |
| Bulgaria (BG) | Bulgarian | CAPI, CAWI | Proportional stratified sampling and random quota sampling |
Q47 | 865 | - |
| Czech Republic (CZ) | Czech | CATI, CAWI | Random digital procedure and random quota sampling |
Q22 | 1599 | 1459 |
| Denmark (DK) | Danish | CAWI | Multi-stage random sampling | Q22 | 3602 | 3506 |
| France (FR) | French | CAWI 3 | Quota sampling | Q22 | 2003 | 2003 |
| Germany (DE) | German | PAPI | Multi-stage random and quota sampling |
Q47 | 2143 | 1991 |
| Hungary (HU) | Hungarian | CATI | Multi-stage random sampling | Q22 | 1195 | 1021 |
| Ireland (IE) | English | CATI | Random digit dialing approach | Q47 | 4487 | 4172 |
| Israel (IL) | Hebrew, Arab, Russian | CATI, CAWI | Multi-stage random sampling | Q22 | 1315 | 1294 |
| Italy (IT) | Italian | CATI, CAWI | Proportional stratified sampling |
Q47 | 3500 | - |
| Norway (NO) | Norwegian | CATI | Random sampling procedure within each stratum |
Q47 | 2855 | 2387 |
| Portugal (PT) | Portuguese | CATI | Random stratified sampling | Q12 | 1247 | 922 |
| Russian Federation 1 (RU) | Russian | PAPI | Multi-stage random sampling | Q22 | 5660 | 4752 |
| Slovakia (SK) | Slovak | CAPI | Multi-stage random sampling | Q22 | 2145 | 2144 |
| Slovenia (SI) | Slovenian | CAPI, SAQ, CAWI | Multi-stage random sampling | Q47 | 3360 | 3178 |
| Switzerland (CH) | French, German, Italian | CAWI 2 | Multi-stage random sampling | Q12 | 2502 | 2370 |
Q12—The HLS19-Q12 short form with 12 items. Q22—A combination of the HLS19-Q12 and the adapted HLS19-Q16 short forms with 22 items. Q47—The HLS19-Q47 long form with 47 items. CATI—assisted telephone interview. CAWI—Computer-assisted web-based interview. CAPI—Computer-assisted personal interview. PAPI—Paper-assisted personal interview. SAQ—Self-administered questionnaire. N—Number of valid responses. IRT—Item Response Theory modelling. 1 In RU, respondents were selected from only three regions, Novosibirsk, Karelia, and Tatarstan. 2 CAWI was the main type of data collection; additionally, a small number of CATI interviews were conducted. 3 The data were collected in two waves. 4 The IRT analyses were conducted before the data collection was completed in all countries, which is why not all the data used in subsequent analyses were yet available for the IRT analyses.