Table 1.
World Mental Health sample characteristics
| Sample size | ||||||
|---|---|---|---|---|---|---|
| Country | Sample composition | Field dates | Age range | Part I | Part II | Response rate |
| High‐income | ||||||
| Argentina | Eight largest urban areas of the country (about 50% of total national population) | 2015 | 18‐98 | 3,927 | 2,116 | 77.3 |
| Australia | Nationally representative | 2007 | 18‐85 | 8,463 | 8,463 | 60.0 |
| Belgium | Nationally representative (selected from a national register of Belgium residents) | 2001‐2 | 18‐95 | 2,419 | 1,043 | 50.6 |
| France | Nationally representative (selected from a national list of households with listed telephone numbers) | 2001‐2 | 18‐97 | 2,894 | 1,436 | 45.9 |
| Germany | Nationally representative | 2002‐3 | 19‐95 | 3,555 | 1,323 | 57.8 |
| Israel | Nationally representative | 2003‐4 | 21‐98 | 4,859 | 4,859 | 72.6 |
| Italy | Nationally representative (selected from municipality resident registries) | 2001‐2 | 18‐100 | 4,712 | 1,779 | 71.3 |
| Japan | Eleven metropolitan areas | 2002‐6 | 20‐98 | 4,129 | 1,682 | 55.1 |
| The Netherlands | Nationally representative (selected from municipal postal registries) | 2002‐3 | 18‐95 | 2,372 | 1,094 | 56.4 |
| New Zealand | Nationally representative | 2004‐5 | 18‐98 | 12,790 | 7,312 | 73.3 |
| North Ireland | Nationally representative | 2005‐8 | 18‐97 | 4,340 | 1,986 | 68.4 |
| Poland | Nationally representative | 2010‐1 | 18‐65 | 10,081 | 4,000 | 50.4 |
| Portugal | Nationally representative | 2008‐9 | 18‐81 | 3,849 | 2,060 | 57.3 |
| Saudi Arabia | Nationally representative | 2013‐6 | 18‐65 | 3,638 | 1,793 | 61.0 |
| Spain | Nationally representative | 2001‐2 | 18‐98 | 5,473 | 2,121 | 78.6 |
| Spain (Murcia) | Regionally representative (Murcia region) | 2010‐2 | 18‐96 | 2,621 | 1,459 | 67.4 |
| United States | Nationally representative | 2001‐3 | 18‐99 | 9,282 | 5,692 | 70.9 |
| High‐income total | 89,404 | 50,218 | 63.0 | |||
| Low/middle‐income | ||||||
| Brazil (São Paulo) | São Paulo metropolitan area | 2005‐8 | 18‐93 | 5,037 | 2,942 | 81.3 |
| Bulgaria 1 | Nationally representative | 2002‐6 | 18‐98 | 5,318 | 2,233 | 72.0 |
| Bulgaria 2 | Nationally representative | 2016‐7 | 18‐91 | 1,508 | 578 | 61.0 |
| Colombia | All urban areas of the country (about 73% of total national population) | 2003 | 18‐65 | 4,426 | 2,381 | 87.7 |
| Colombia (Medellin) | Medellin metropolitan area | 2011‐2 | 19‐65 | 3,261 | 1,673 | 97.2 |
| Iraq | Nationally representative | 2006‐7 | 18‐96 | 4,332 | 4,332 | 95.2 |
| Lebanon | Nationally representative | 2002‐3 | 18‐94 | 2,857 | 1,031 | 70.0 |
| Mexico | All urban areas of the country (about 75% of total national population) | 2001‐2 | 18‐65 | 5,782 | 2,362 | 76.6 |
| Nigeria | 21 of 36 states (57% of national population) | 2002‐4 | 18‐100 | 6,752 | 2,143 | 79.3 |
| Peru | Five urban areas (about 38% of total national population). | 2004‐5 | 18‐65 | 3,930 | 1,801 | 90.2 |
| People's Republic of China (Shenzhen) | Shenzhen metropolitan area | 2005‐7 | 18‐88 | 7,132 | 2,475 | 80.0 |
| Romania | Nationally representative | 2005‐6 | 18‐96 | 2,357 | 2,357 | 70.9 |
| South Africa | Nationally representative | 2002‐4 | 18‐92 | 4,315 | 4,315 | 87.1 |
| Low/middle‐income total | 57,007 | 30,623 | 80.6 | |||
| Total | 146,411 | 80,841 | 68.9 | |||