Table 2. Univariable and multivariable logistic regression analysis of nodal upstaging.
| Variables | Univariable analysis | Multivariable analysis | |||||
|---|---|---|---|---|---|---|---|
| OR | P value | 95% CI | OR | P value | 95% CI | ||
| Age | 1.036 | 0.045 | 1.001, 1.073 | ||||
| Preoperative CEA level (>3.4 μg/L) | 4.460 | <0.001 | 2.445, 8.137 | 2.931 | 0.001 | 1.511, 5.688 | |
| Tumor location | 0.057 | ||||||
| LUL | |||||||
| LLL | 0.976 | 0.953 | 0.440, 2.166 | ||||
| RUL | 0.318 | 0.007 | 0.138, 0.735 | ||||
| RML | 0.524 | 0.284 | 0.161, 1.707 | ||||
| RLL | 0.578 | 0.225 | 0.239, 1.400 | ||||
| Imaging tumor size (>18.3 mm) | 5.216 | <0.001 | 2.530, 10.755 | 3.482 | 0.002 | 1.609, 7.535 | |
| Pleural indentation sign (presence) | 1.948 | 0.026 | 1.082, 3.507 | ||||
| Lobulation sign (presence) | 3.048 | <0.001 | 1.684, 5.516 | ||||
| Spiculation sign (presence) | 2.746 | 0.001 | 1.492, 5.055 | ||||
| CTR (>0.788) | 11.726 | <0.001 | 4.864, 28.270 | 8.791 | <0.001 | 3.570, 21.651 | |
OR, odds ratio; CI, confidence interval; CEA, carcinoembryonic antigen; LUL, left upper lobe; LLL, left lower lobe; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; CTR, consolidation tumor ratio.