| NDDG 3-hour 100 g OGTT | Carpenter & Coustan 3-hour 100 g OGTT | IADPSG 2-hour 75 g OGTT |
Fasting | ≥105 (5.8) | ≥95 (5.3) | ≥92 (5.1) |
1 h | ≥190 (10.6) | ≥180 (10.0) | ≥180 (10.0) |
2 h | ≥165 (9.2) | ≥155 (8.6) | ≥153 (8.5) |
3 h | ≥145 (8.0) | ≥140 (7.8) |  |
The number of abnormal values needed for the diagnosis of GDM | ≥ 2 | ≥ 2 | ≥ 1 |