Table 1. Variables on which the samples in each country were matched to the population.
Countries in which no demographic variable was census matched are marked as “N/A” in the “matched variables” column. SES, socioeconomic status.
| Sample | Matched variables | N | Sample | Matched variables | N |
|---|---|---|---|---|---|
| Algeria | N/A | 528 | Philippines | N/A | 145 |
| Armenia | N/A | 492 | Poland_1 | Age, gender, education | 1883 |
| Australia | Gender | 979 | Poland_2 | N/A | 463 |
| Austria | Age, gender | 502 | Portugal | N/A | 499 |
| Belgium_1 | Age, gender | 522 | Romania | N/A | 411 |
| Belgium_2 | Age, gender | 512 | Russia_1 | N/A | 718 |
| Brazil | Age, gender, education | 1261 | Russia_2 | Region, ethnicity | 395 |
| Bulgaria | Age, gender | 778 | Russia_3 | N/A | 322 |
| Canada_1 | N/A | 858 | Saudi Arabia | N/A | 489 |
| Canada_2 | Age, gender | 303 | Serbia | N/A | 337 |
| Chile | Age, gender, region, SES | 1992 | Singapore | N/A | 500 |
| China | N/A | 896 | Slovakia | Age, gender, region, municipality size | 1027 |
| Czechia | N/A | 547 | Slovenia | Age, gender | 501 |
| Denmark | Age, gender, region | 792 | South Africa | Age, gender | 496 |
| Ecuador | Age, gender, region | 679 | South Korea | Age, gender | 639 |
| Finland | Age, gender | 625 | Spain_1 | N/A | 110 |
| France | Age, gender | 1480 | Spain_2 | Age, gender, region | 434 |
| Gambia | N/A | 527 | Sri Lanka | N/A | 413 |
| Germany | Age, gender, region | 1545 | Sudan | Age, gender | 623 |
| Ghana | Age, gender | 522 | Sweden | Age, gender | 2393 |
| Greece | Age, gender | 597 | Switzerland_1 | Age, gender | 512 |
| India | N/A | 688 | Switzerland_2 | Age, gender | 531 |
| Ireland | N/A | 753 | Taiwan | N/A | 206 |
| Israel | Age, gender, region, ethnicity | 1384 | Tanzania | Age, gender | 104 |
| Italy_1 | Age, gender, region | 591 | Thailand | N/A | 586 |
| Italy_2 | Gender | 993 | Turkey_1 | N/A | 359 |
| Japan_1 | N/A | 653 | Turkey_2 | Age, gender | 347 |
| Japan_2 | Income, education, region, ethnicity | 802 | Uganda | Age, gender | 476 |
| Kenya | Age, gender | 409 | UK_1 | N/A | 220 |
| Latvia | Income, education, ethnicity | 485 | UK_2 | Age, gender | 952 |
| Mexico | Age, gender | 490 | UK_3 | N/A | 234 |
| Morocco | Age, gender | 474 | UK_4 | gender | 501 |
| Netherlands_1 | Age, gender | 854 | Ukraine | N/A | 496 |
| Netherlands_2 | Age, gender | 510 | UAE | Broadly representative | 554 |
| Netherlands_3 | N/A | 500 | Uruguay | N/A | 838 |
| New Zealand | Gender | 1005 | USA_1 | Age, gender | 2360 |
| Nigeria | Age, gender | 1513 | USA_2 | Age, gender, region, ethnicity | 5055 |
| North Macedonia | N/A | 878 | USA_3 | Age, gender | 497 |
| Norway | Age, gender, ethnicity | 997 | Venezuela | N/A | 110 |
| Peru | Age, gender | 405 | Vietnam | N/A | 383 |