| Country/region | GSTM1 | GSTM1 null | GSTT1 null | References |
| Tabuk (Northwestern Saudi Arabia) | 100 | 15% | 34% | Our study |
| Lebanese | 141 | 52.5% | 37.6% | [24] |
| Tunisians | 186 | 63.3% | 37.1% | [25] |
| Bahrainis | 167 | 49.7% | 28.7% | [24] |
| North India | 248 | 33% | 18.4% | [26] |
| England | 88 | 50.8% | 16.9% | [27] |
| Central Europe | 70 | 45% | 13% | [28] |
| Turkish | 64 | 51.9% | 16.3% | [29] |
| Japan | 39 | 55.7% | 44.3% | [30] |
| W-USA | 188 | 52% | 16% | [31] |
| Chinese | 234 | 51% | 46% | [32] |
| Brazilian Non White | 179 | 34.2% | 25.7% | [33] |
| Italians | 145 | 46.9% | 19% | [34] |
| Caucasian | 85 | 48.8% | 19.9% | [35] |
| South India | 361 | 30.1% | 16.8% | [36] |
| Egypt | 89 | 55.5% | 29.5% | [37] |
| African-American | 195 | 28% | 17% | [38] |
| Gambia | 269 | 20.2% | 37.1% | [39] |