Table 6. Comparison of DREEM Mean Total Scores of Different Studies in Various Countries.
| Country | Year of Study | Number of Participants | Mean Total Score |
|---|---|---|---|
| Asia | |||
| Iran (22) | 2010 | 210 | 99.6 |
| Saudi Arabia (6) | 2004 | 450 | 102 |
| Saudi Arabia (7) | 2008 | 500 | 89.9 |
| Saudi Arabia (4) | 2012 | 358 | 108.28 |
| United Arab Emirates (8) | 2011 | 190 | 120 |
| Kuwait (23) | 2009 | 202 | 105 |
| Turkey (9) | 2008 | 553 | 117.63 |
| Malaysia (24) | 2009 | 71 | 133.12 |
| Sri Lanka (5) | 2005 | 339 | 108 |
| Japan (2) | 2010 | 6725 | 112 |
| Europe | |||
| Germany (10) | 2011 | 1119 | 109.75 |
| Sweden (11) | 2011 | 503 | 145.2 |
| United Kingdom (25) | 2009 | 216 | 143.3 |
| United Kingdom (14) | 2005 | 206 | 139 |
| United Kingdom (12) | 2007 | 130 | 143 |
| Ireland (18) | 2010 | 199 | 149.47 |
| North America | |||
| Canada (15) | 2004 | 407 | 97 |
| South America | |||
| Chile (26) | 2009 | 328 | 127.5 |
| Australia | |||
| Australia (27) | 2009 | 143 | 62 |