Table 3.
Correlation between the significant values and lymph node metastasis.
| Cohort | Solid-part size | pN (%) | p value | Sensitivity (%) | Specificity (%) | Accuracy (%) | NPV (%) |
|---|---|---|---|---|---|---|---|
| Derivation | > 1.83 cm | 44 (23) | < 0.001 | 44/56 (79) | 278/424 (66) | 322/480 (67) | 278/290 (96) |
| < 1.83 cm | 12 (4) | ||||||
| Validation | > 1.83 cm | 16 (15) | 0.114 | 16/27 (59) | 121/213 (57) | 137/240 (57) | 121/132 (92) |
| < 1.83 cm | 11 (8) | ||||||
| All | > 1.83 cm | 60 (20) | < 0 .001 | 60/83 (72) | 399/637 (63) | 459/720 (64) | 399/422 (95) |
| < 1.83 cm | 23 (6) | ||||||
| Cohort | Average solid CT value | pN (%) | p value | Sensitivity (%) | Specificity (%) | Accuracy (%) | NPV (%) |
| Derivation | > − 103 HU | 39 (22) | < 0.001 | 39/56 (70) | 288/424 (68) | 327/480 (68) | 288/305 (94) |
| < − 103 HU | 17 (6) | ||||||
| Validation | > − 103 HU | 18 (17) | 0.011 | 18/27 (67) | 126/213 (59) | 144/240 (60) | 126/135 (93) |
| < − 103 HU | 9 (7) | ||||||
| All | > − 103 HU | 57 (20) | < 0 .001 | 57/83 (69) | 414/637 (65) | 471/720 (65) | 414/440 (94) |
| < − 103 HU | 26 (6) |
pN pathological lymph node metastasis; NPV negative predictive value; CT computed tomography; HU Hounsfield units.