Table 1 Social survey summary of each of the 32 target countries
Countries | Date of Collection | Gross sample sizea | Sample size | Response rateb | Min age | Max age | Mean age | Analyzed samplec | Survey methods | Sampling methods | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|
Australia | May 2012 - Aug 2012 | 6250 | 1946 | 31.1 | 18 | 97 | 55.1 | 1830 | Postal survey (self-completion) | Random sampling | Yes |
Belgium | Apr 2011 - Dec 2012 | 8821 | 3083 | 35.0 | 17 | 95 | 49.7 | 2850 | Face-to-face interview (CAPI) and mail survey | Stratified two-stage random sampling and Simple random sampling | Yes |
Bulgaria | Aug 2011 - Sep 2011 | 2275 | 1003 | 44.1 | 18 | 90 | 51.9 | 969 | Face-to-face (PAPI) interview | Three stage random sampling | Yes |
Chile | Nov 2011 - Dec 2011 | 1872 | 1559 | 83.3 | 18 | 99 | 46.5 | 1436 | Face-to-face interview | Three stage random sampling | Yes |
China | Jun 2011 - Nov 2011 | 7800 | 5620 | 72.1 | 17 | 97 | 47.8 | 5558 | Face-to-face interview | Multi-stage stratified sampling | Yes |
Taiwan | Jul 2011 - Apr 2012 | 4424 | 2199 | 49.7 | 18 | 93 | 46.8 | 2196 | Face-to-face interview (pencil and paper & CAPI) | Three-stage stratified PPS sampling | Yes |
Croatia | May 2011 - Jun 2011 | 2576 | 1210 | 47.0 | 18 | 87 | 45.6 | 1132 | Face to face interview | Multistage sampling | No |
Czech Republic | Feb 2012 - Mar 2012 | 3230 | 1804 | 55.9 | 18 | 92 | 47.4 | 1696 | Face-to-face interview | Four stage stratified probability sampling | Yes |
Denmark | Jan 2013 - Mar 2013 | 2500 | 1388 | 55.5 | 18 | 102 | 46.3 | 1364 | Web based mail survey (self-completion) | Simple random sampling | No |
Finland | Aug 2011 - Dec 2011 | 2500 | 1340 | 53.6 | 15 | 75 | 46.2 | 1309 | Postal, paper and pencil or internet survey (self-completion) | Systematic sampling | Yes |
France | Mar 2011 - Sep 2011 | 10,000 | 3319 | 33.2 | 18 | 95 | 52.1 | 3025 | Postal survey | Random equal probability sampling | Yes |
Germany | Apr 2012 - Sep 2012 | 5103 | 1681 | 32.9 | 18 | 95 | 49.5 | 1632 | Self-completion questionnaire (CASI) and face-to-face interview (CAPI) | Two stage random sampling | No |
Israel | Nov 2011 - Apr 2012 | 1594 | 1220 | 76.5 | 18 | 92 | 45.8 | 1084 | Face to face interview | Four stage stratified sampling | No |
Italy | Oct 2012 - Feb 2013 | 5062 | 1186 | 23.4 | 16 | 92 | 50.7 | 1074 | Self-completion questionnaire (paper and pencil) was delivered by interviewer and returned by mail | Four stage stratified sampling | Yes |
Japan | Nov 2011 - Dec 2011 | 1800 | 1306 | 72.6 | 16 | 100 | 50.5 | 1287 | Self-completion | Two-stage stratified random sampling | No |
South Korea | Jun 2011 - Aug 2011 | 2500 | 1535 | 61.4 | 18 | 94 | 46.0 | 1535 | Face-to-face interview | Multi-stage area probability sampling | No |
Lithuania | Nov 2011 - Dec 2011 | 3313 | 1187 | 35.8 | 18 | 87 | 47.7 | 1099 | Face to face interview/paper and pencil interview (PAPI), with visuals | Multistage stratified sampling | Yes |
Netherlands | Mar 2011 - Dec 2011 | 4500 | 1472 | 32.7 | 17 | 97 | 54.0 | 1406 | Postal survey | Simple random sampling | Yes |
Norway | Mar 2012 - Apr 2012 | 3800 | 1834 | 48.3 | 18 | 77 | 48.3 | 1789 | Postal and web survey | Random sampling | No |
Philippines | Sep 2011 - Sep 2011 | 3206 | 1200 | 37.4 | 18 | 86 | 42.9 | 1167 | Face-to-face interviews with visuals | Multi-stage Probability Sampling | Yes |
Poland | Apr 2013 - Apr 2013 | 2640 | 1115 | 42.2 | 18 | 88 | 47.8 | 1081 | CAPI | Multi-stage area probability sampling | Yes |
Portugal | Nov 2012 - Apr 2013 | 2256 | 1022 | 45.3 | 18 | 93 | 51.6 | 968 | CAPI | Four stage area sampling | Yes |
Russia | Dec 2011 - Dec 2011 | 3170 | 1511 | 47.7 | 18 | 96 | 48.1 | 1467 | Face-to-face interviews | Four stage stratified probability sampling | Yes |
Slovakia | Oct 2012 - Dec 2012 | 2544 | 1128 | 44.3 | 18 | 92 | 51.9 | 1111 | CAPI with visuals | Two stage sampling | Yes |
Slovenia | Mar 2011 - Jun 2011 | 1800 | 1082 | 60.1 | 18 | 99 | 48.6 | 1062 | Personal interviews (pencil and paper with visuals) | Two-stage stratified random sampling | No |
South Africa | Sep 2011 - Oct 2011 | 3500 | 3004 | 85.8 | 16 | 95 | 40.6 | 2757 | Face-to-face interview | Multi-stage stratified sampling | Yes |
Spain | May 2012 - Jul 2012 | 4000 | 2712 | 67.8 | 18 | 97 | 49.2 | 2622 | Face-to-face interview | Two phased, stratified by clusters. Proportional random sampling | Yes |
Sweden | Feb 2011 - May 2011 | 1966 | 1158 | 58.9 | 18 | 80 | 50.0 | 1087 | Postal survey | A representative sample of the Swedish population | No |
Switzerland | Mar 2011 - Nov 2011 | 2409 | 1212 | 50.3 | 19 | 98 | 48.9 | 1192 | CAPI | Simple random sampling | No |
Turkey | Nov 2011 - Jan 2012 | 3150 | 1559 | 49.5 | 17 | 92 | 42.1 | 1398 | Face-to-face interview with visuals | Multi-stage area sampling | No |
UK | Jul 2011 - Nov 2011 | 2260 | 936 | 41.4 | 17 | 97 | 49.7 | 897 | Face-to-face interview and postal survey (self-completion) | Clustered random sampling | Yes |
US | Mar 2012 - Sep 2012 | 2044 | 1550 | 75.8 | 20 | 89 | 50.0 | 1512 | Face-to-face interview with CAPI | Multi-stage area probability sample | Yes |
Total | Mar 2011 - Mar 2013 | 114,865 | 55,081 | 48.0 | 15 | 102 | 48.3 | 52,592 | Â | Â | Â |