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Table 1 World Mental Health sample characteristics by World Bank income categories

From: The cross-national epidemiology of social anxiety disorder: Data from the World Mental Health Survey Initiative

Country Survey Sample characteristics Field dates Age rangeb Sample size Response rate (%)
Part 1 Part 2 subsample
Low/lower-middle income countriesa
Colombia NSMH All urban areas of the country (approximately 73% of the total national population) 2003 18–65 4426 2381 87.7
Iraq IMHS Nationally representative 2006–2007 18+ 4332 4332 95.2
Nigeria NSMHW 21 of the 36 states in the country, representing 57% of the national population. The surveys were conducted in Yoruba, Igbo, Hausa and Efik languages 2002–2003 18+ 6752 2143 79.3
Peru EMSMP Five urban areas of the country (approximately 38% of the total national population) 2004–2005 18–65 3930 1801 90.2
PRC Beijing/Shanghai B-WMH S-WMH Beijing and Shanghai metropolitan areas 2002–2003 18+ 5201 1628 74.7
PRC Shen Zhen Shenzhen Shen Zhen metropolitan area. Included temporary residents as well as household residents 2006–2007 18+ 7132 2475 80.0
Ukraine CMDPSD Nationally representative 2002 18+ 4725 1720 78.3
Upper-middle income countriesa
Brazil São Paulo Megacity São Paulo metropolitan area 2005–2007 18+ 5037 2942 81.3
Bulgaria NSHS Nationally representative 2003–2007 18+ 5318 2233 72.0
Colombia (Medellin)c MMHHS Medellin metropolitan area 2011–2012 18–65 3261 1673 97.2
Lebanon LEBANON Nationally representative 2002–2003 18+ 2857 1031 70.0
Mexico M-NCS All urban areas of the country (approximately 75% of the total national population) 2001–2002 18–65 5782 2362 76.6
Romania RMHS Nationally representative 2005–2006 18+ 2357 2357 70.9
South Africa SASH Nationally representative 2003–2004 18+ 4315 4315 87.1
High income countriesa
Australia SMHWB Nationally representative 2007 18–85 8463 8463 60.0
Belgium ESEMeD Nationally representative 2001–2002 18+ 2419 1043 50.6
France ESEMeD Nationally representative 2001–2002 18+ 2894 1436 45.9
Germany ESEMeD Nationally representative 2002–2003 18+ 3555 1323 57.8
Italy ESEMeD Nationally representative 2001–2002 18+ 4712 1779 71.3
Japan WMHJ Eleven metropolitan areas 2002–2006 20+ 4129 1682 55.1
New Zealand NZMHS Nationally representative 2003–2004 18+ 12790 7312 73.3
Northern Ireland NISHS Nationally representative 2004–2007 18+ 4340 1986 68.4
Poland EZOP Nationally representative 2010–2011 18–64 10081 4000 50.4
Portugal NMHS Nationally representative 2008–2009 18+ 3849 2060 57.3
Spain ESEMeD Nationally representative 2001–2002 18+ 5473 2121 78.6
Spain (Murcia) PEGASUS-Murcia Murcia region 2010–2012 18+ 2621 1459 67.4
The Netherlands ESEMeD Nationally representative 2002–2003 18+ 2372 1094 56.4
USA NCS-R Nationally representative 2002–2003 18+ 9282 5692 70.9
Total      142,405 74,843  
Weighted average response rate (%)       69.4
  1. aThe World Bank. (2008). Data and Statistics. Accessed May 12, 2009 at: http://go.worldbank.org/D7SN0B8YU0
  2. bFor the purposes of cross-national comparisons we limit the sample to those 18+
  3. cThe newer Colombian survey in Medellin classified Colombia as an upper-middle income country (due to a change of classification by the World Bank), although in the original survey Colombia was classified as a low/lower-middle income country
  4. ESEMeD (The European Study Of The Epidemiology Of Mental Disorders); NHS (Israel National Health Survey); WMHJ 2002-2006 (World Mental Health Japan Survey); NZMHS (New Zealand Mental Health Survey); NCS-R (The USA National Comorbidity Survey Replication); NSMH (The Colombian National Study of Mental Health); WMHI (World Mental Health India); LEBANON (Lebanese Evaluation of the Burden of Ailments and Needs of the Nation); M-NCS (The Mexico National Comorbidity Survey); SASH (South Africa Stress and Health Study); CMDPSD (Comorbid Mental Disorders during Periods of Social Disruption)