Table 1.
Sample characteristics of the World Mental Health Surveys
| Country | Survey | Field dates | Age range | Sample size | Response rate | ||
|---|---|---|---|---|---|---|---|
| Part I | Part II | Part II and age ≤ 44a | |||||
| Belgium | ESEMeD | 2001-2 | 18+ | 2419 | 1043 | 1486 | 50.6 |
| Colombia | NSMH | 2003 | 18-65 | 4426 | 2381 | 1731 | 87.7 |
| France | ESEMeD | 2001-2 | 18+ | 2894 | 1436 | 1727 | 45.9 |
| Germany | ESEMeD | 2002-3 | 18+ | 3555 | 1323 | 1621 | 57.8 |
| Israel | NHS | 2002-4 | 21+ | 4859 | - | - | 72.6 |
| Italy | ESEMeD | 2001-2 | 18+ | 4712 | 1779 | 1853 | 71.3 |
| Japan | WMHJ 2002-2003 | 2002-3 | 20+ | 2436 | 1887 | 1282 | 56.4 |
| Lebanon | LEBANON | 2002-3 | 18+ | 2857 | 1031 | 1595 | 70.0 |
| Mexico | M-NCS | 2001-2 | 18-65 | 5782 | 2362 | 1736 | 76.6 |
| Netherlands | ESEMeD | 2002-3 | 18+ | 2372 | 1094 | 1516 | 56.4 |
| New Zealand | NZMHS | 2004-5 | 16+ | 2992 | 7435 | 4242 | 73.3 |
| Nigeria | NSMHW | 2002-3 | 18+ | 6752 | 2143 | 1203 | 79.3 |
| People’s Republic of China | B-WMH S-WMH | 2002-3 | 18+ | 5201 | 1628 | 1570 | 74.7 |
| South Africa | SASH | 2003-4 | 18+ | 4315 | - | - | 87.1 |
| Spain | ESEMeD | 2001-2 | 18+ | 5473 | 2121 | 1960 | 78.6 |
| Ukraine | CMDPSD | 2002 | 18+ | 4725 | 1720 | 1541 | 78.3 |
| United States | NCS-R | 2002-3 | 18+ | 9282 | 5692 | 3197 | 70.9 |
ESEMeD - European Study of the Epidemiology of Mental Disorders; NSMH - Colombian National Study of Mental Health; NHS - Israel National Health Survey; WMHJ 2002-2003 - World Mental Health Japan Survey; LEBANON - Lebanese Evaluation of the Burden of Ailments and Needs of the Nation; M-NCS - Mexico National Comorbidity Survey; NZMHS - New Zealand Mental Health Survey; NSMHW - Nigerian Survey of Mental Health and Wellbeing; B-WMH - Beijing World Mental Health Survey; S-WMH - Shanghai World Mental Health Survey; SASH - South Africa Health Survey; CMDPSD - Comorbid Mental Disorders during Periods of Social Disruption; NCS-R - U.S. National Comorbidity Survey Replication The response rate is calculated as the ratio of the number of households in which an interview was completed to the number of households originally sampled, excluding from the denominator households known not to be eligible either because of being vacant at the time of initial contact or because the residents were unable to speak the designated languages of the survey
a All countries were age restricted to ≤44, with the exception of Nigeria, People’s Republic of China, and Ukraine, which were age restricted to ≤39