| Author/Year | Country | Genotype (%) | ||
| AA | AG | GG | ||
| Nelson, 2001 | USA | 30.8 | 46.0 | 23.2 |
| Huang, 1997 | Australia | 23.5 | 51.7 | 24.7 |
| Niino, 2002 | Japan | 27.3 | 52.1 | 20.7 |
| Seo, 2002 | Korea | 34.9 | 48.6 | 16.5 |
| Lai, 2003 | Taiwan | 26.0 | 53.7 | 20.3 |
| Dybikowska, 2004 | Poland | 29.2 | 52.3 | 18.4 |
| Lai, 2005 | Taiwan | 28.6 | 50.6 | 20.8 |
| Sun, 2005 | China | 43.6 | 44.2 | 12.2 |
| Ueda, 2005* | Japan | 30.2 | - | - |
| Ueda, 2006 | Japan | 24.2 | 56.8 | 18.9 |
| Jrad, 2006 | Tunisia | 31.2 | 50.8 | 17.8 |
| Park, 2006 | Korea | 27.8 | 52.8 | 19.4 |
| Kang, 2008 | Korea | 35.4 | 51.9 | 12.7 |
| Mean |
| 30.2 | 50.9 | 18.8 |
| Present study | Brazil | 23.5 | 49.8 | 26.7 |