Table 4.
Accuracy of the nomogram in predicting the risk of microvascular invasion at the optimal threshold value
| Variable |
Value (95%CI) |
|
| Training cohort | Validation cohort | |
| Sensitivity, % | 77.7 (71.1–84.3) | 69.2 (56.3–82.2) |
| Specificity, % | 70.9 (64.2–77.5) | 68.3 (56.4–80.1) |
| Positive predictive value, % | 69.7 (62.8–76.6) | 64.3 (51.3–77.2) |
| Negative predictive value, % | 78.7 (72.3–85.0) | 72.9 (61.2–84.6) |
| Positive likelihood ratio | 2.67 (2.10–3.40) | 2.18 (1.45–3.27) |
| Negative likelihood ratio | 0.31 (0.23–0.42) | 0.45 (0.30–0.69) |
| Concordance index | 0.79 (0.74–0.84) | 0.81 (0.74–0.89) |
| Predicted probability1 | 0.40 | 0.40 |
1
Predicted probability refers to the optimal cut-off value for microvascular invasion prediction based on the maximum Youden index. CI: Confidence interval.