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Comparison of collagen content and tumor intraoperative judgment (n = 38)
| Pre judgment results | Collagen judgment standard | Intraoperative findings and cases | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Youden index | |
|---|---|---|---|---|---|---|---|---|
| Soft | Medium/tough | |||||||
| Soft | ≤ 3.74% | 13 | 2 | 100.0 | 92.0 | 86.7 | 100.0 | 0.920 |
| > 3.74% | 0 | 23 | ||||||
| Tough | Soft/medium | |||||||
| Tough | ≥ 8.93% | 7 | 5 | 87.5 | 83.3 | 58.3 | 96.2 | 0.708 |
| < 8.93% | 1 | 25 | ||||||
