Table 2.
Performance of the cutoff points of 0.3 and 0.7 for the GBDT model in predicting GDM.
| Cutoff points | Development cohort Percent (95% CI) |
Validation cohort Percent (95% CI) |
|---|---|---|
| 0.3 | ||
| Negative predictive value | 82.40% (79.90%-84.70%) | 74.10% (69.50%-78.20%) |
| Positive predictive value | 51.3% (49.80%-52.90%) | 52.60% (50.20%-54.90%) |
| Sensitivity | 92% (90.80%-93.10%) | 90% (88.00%-91.70%) |
| Specificity | 30% (28.30%-31.80%) | 26% (23.50%-28.70%) |
| Positive likelihood ratio | 1.31 (1.29-1.34) | 1.22 (1.18-1.26) |
| Negative likelihood ratio | 0.27 (0.11-0.42) | 0.39 (0.17-0.60) |
| 0.7 | ||
| Negative predictive value | 59.30% (57.80%-60.70%) | 56.1% (53.90%-58.30%) |
| Positive predictive value | 86.60% (82.90%-89.60%) | 93.2% (88.20%-96.10%) |
| Sensitivity | 16% (14.50%-17.60%) | 15% (12.90%-17.30%) |
| Specificity | 98% (97.40%-98.50%) | 99% (98.20%-99.40%) |
| Positive likelihood ratio | 8 (7.72-8.28) | 15 (14.38-15.61) |
| Negative likelihood ratio | 0.86 (0.84-0.88) | 0.86 (0.83-0.89) |