Prevalence of UGT2B17 polymorphism derived from testosterone concentration
| Populations | Reference | del/del % | del/ins + ins/ins % |
| AF South Africa + Uganda | this work | 22 | 78 |
| USA | 28 | 12 | 88 |
| Nigeria | 26 | 22 | 78 |
| USA | 29 | 2 | 98 |
| AS Japan | this work | 81 | 19 |
| Korea | 18 | 67 | 33 |
| China + Japan | 26 | 84 | 16 |
| China + Japan | 27 | 85 | 15 |
| CA Italy + Switzerland | this work | 10 | 90 |
| Sweden | 18 | 9 | 91 |
| USA | 29 | 11 | 89 |
| USA | 28 | 11 | 89 |
| USA | 26 | 30 | 70 |
| USA | 27 | 32 | 68 |
| HI Argentina | this work | 7 | 93 |