Table 1. Diagnostic accuracy studies of GA and the cutoff points found to screening DM.
| Study | N | Country | Male | RI GA (%) | DM cutoff | SxS |
|---|---|---|---|---|---|---|
| Tominaga and cols. 2006 | 699 | Japan | 52% | 12.3 - 16.9 | - | - |
| Paroni and cols. 2007 | 32 | Italy | 37% | 11.7 - 16.9 | - | - |
| Kohzuma and cols. 2011 | 201 | USA | 47% | 11.9 - 15.8 | - | - |
| Furusyo and cols. 2011 | 1.575 | Japan | 30% | 12.2 - 16.5 | 15.5% | 83.3 x 83.3 |
| Hwang and cols. 2014 | 852 | Korean | 58% | - | 14.3% | 66.4 x 52.5 |
| Ikezaki and cols. 2015 | 176 | Japan | 46% | - | 15.2% | 62.1 x 61.9 |
| Hsu and cols. 2015 | 2.192 | Taiwan | 50% | - | 14.9% | 78.5 x 80.0 |
| Testa and cols. 2017 | 252 | Italy | 38% | 9.0 - 16.0 | - | - |
RI GA: reference interval for GA; SxS: sensitivity and specificity to the cutoff points found.