Table 1. Characteristics of the first 17 population surveys for the World Mental Health (WMH) Survey Consortium.
| Site | No | Age range | Year fielded | Level of study participation (%) | Sample composition |
|---|---|---|---|---|---|
| Americas | |||||
| Colombia | 4426 | 18-65 | 2003 | 88 | Household residents in all urban areas of the country (approx 73% of total national population) |
| Mexico | 5782 | 18-65 | 2001–2 | 77 | Household residents in all urban areas of the country (approx 73% of total national population) |
| USA | 9282 | ≥18 | 2002–3 | 71 | Household residents, nationally representative |
| Asia and Pacific Region | |||||
| Japan | 1663 | ≥20 | 2002–3 | 56 | Household residents in four metropolitan areas: Fukiage, Kushikino, Nagasaki, Oyayama |
| People's Republic of China (PRC) | 5201 | ≥18 | 2002–3 | 75 | Household residents in Beijing (2633) and Shanghai (2568) metropolitan areas |
| New Zealand | 12790 | ≥18* | 2003–4 | 73 | Household residents, nationally representative |
| Europe | |||||
| Belgium | 2419 | ≥18 | 2001–2 | 51 | Households from national resident register, nationally representative |
| France | 2894 | ≥18 | 2001–2 | 46 | Households with working and listed telephone numbers, nationally representative |
| Germany | 3555 | ≥18 | 2002–3 | 58 | Individuals from community resident registries, nationally representative |
| Italy | 4712 | ≥18 | 2001–2 | 71 | Individuals from municipality resident registries, nationally representative |
| Netherlands | 2372 | ≥18 | 2001–2 | 56 | Household residents listed in municipal postal registries, nationally representative |
| Spain | 5473 | ≥18 | 2001–2 | 79 | Household residents, nationally representative |
| Ukraine | 4725 | ≥18 | 2002 | 78 | Household residents speaking either Russian and Ukrainian, nationally representative |
| Middle East and Africa | |||||
| Israel | 4859 | ≥21 | 2002–4 | 73 | Individuals from national resident register, nationally representative |
| Lebanon | 2856 | ≥18 | 2002–3 | 70 | Household residents, nationally representative |
| Nigeria | 6752 | ≥18 | 2002–4 | 80 | Household residents in 21 of the country's 36 states (approx 57% of total national population) |
| South Africa | 4315 | ≥18* | 2002–3 | 87 | Household residents, nationally representative |
*
New Zealand and South Africa samples restricted to those ≥18 years for this report.