Table 2.
Gestational diabetes mellitus screening capacity among Mexican adolescents at different fasting glucose cut-off values
| Fasting glucose cut-off | Sensitivity % (95% CI) | Specificity % (95% CI) | PPV % (95% CI) | NPV % (95% CI) | LR (+) (95% CI) |
LR (−) (95% CI) |
OGTT |
| 75 mg/dL (4.2 mmol/L) | 98.5 (92 to 99) |
22.4 (20 to 25) |
7.9 (6 to 10) |
99.6 (97 to 99.9) |
1.3 (1.2 to 1.3) |
0.06 (0.01 to 0.46) |
838 (79%) |
| 80 mg/dL (4.5 mmol/L) | 97 (89 to 99) |
50.1 (47 to 53) |
11.6 (9 to 15) |
99.6 (98.5 to 99.9) |
1.9 (1.8 to 2.1) |
0.06 (0.02 to 0.23) |
563 (53.1%) |
| 85 mg/dL (4.7 mmol/L) | 94 (86 to 97) |
78.6 (76 to 81) |
22.9 (18 to 28) |
99.5 (98 to 99.8) |
4.3 (3.8 to 5.0) |
0.07 (0.03 to 0.19) |
279 (26.3%) |
| 90 mg/dL (5.0 mmol/L) | 91 (82 to 95) |
96.6 (95 to 97) |
64.2 (54 to 73) |
99.4 (98.6to 99.7) |
26.7 (18.8 to 37) |
0.09 (0.04 to 0.19) |
99 (9.3%) |
| 92 mg/dL (5.1 mmol/L) | 88.4 (78 to 94) |
99.9 (99 to 100) |
99.2 (91 to 99) |
99.2 (98 to 99) |
884 (123 to 6231) |
0.12 (0.06 to 0.22) |
64 (6%) |
LR, likelihood ratio; NPV, negative predictive value; OGTT, oral glucose tolerance test; PPV, predictive positive value.