Table 2.
Results of correlation analysis in group A (benign stenosis)
| CT-features | Spearman’s rank correlation test (rs), Pearson product moment correlation coefficient (r) | P value |
| Concentric esophageal wall thickening | rs = 0.656 | 0.000 |
| Smooth upper and lower boundaries | rs = 0.510 | 0.000 |
| Absence of the luminal mass | rs = 0.827 | 0.000 |
| Presence of the mucous membrane in the stenosis ("target sign") | rs = 0.779 | 0.000 |
| Homogeneity of contrast medium uptake | rs = 0.354 | 0.003 |
| Conically shaped suprastenotic dilatation | rs = 0.711 | 0.000 |
| Smooth mucous membrane at the transition to stenosis | rs = 0.657 | 0.000 |
| Size of the regional lymph nodes | rs =0.542 | 0.000 |
| Wall thickness (mm) | rs = 0.080 | 0.437 |
| Length of esophageal wall thickness (mm) | rs = 0.263 | 0.290 |
| CT attenuation value of the post-inflammatory stricture in native phase | r = 0.055 | 0.652 |
| CT attenuation value of the post-inflammatory stricture in arterial phase | r = -0.736 | 0.000 |
| CT attenuation value of the post-inflammatory stricture in venous phase | r = -0.444 | 0.000 |
| CT attenuation value of the post-inflammatory stricture in delayed phase | r = 0.579 | 0.000 |
| ΔCT in unenhanced phase | r = 0.068 | 0.594 |
| ΔCT in arterial phase | r = -0.709 | 0.000 |
| ΔCT in venous phase | r = -0.565 | 0.000 |
| ΔCT in delayed phase | r = 0.652 | 0.000 |
Computed tomography (CT) features that have strong and average correlation coefficient values are underlined.