Table 2 Relation between nodule size and irregularity index in CT scan with the final diagnosis
Diagnosis | P-value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Benign | Malignant | ||||||||||
Mean | SD | Median | Minimum | Maximum | Mean | SD | Median | Minimum | Maximum | ||
Long-axis diameter (mm) | 11.25 | 6.15 | 10.05 | 3.30 | 22.90 | 6.66 | 3.53 | 5.80 | 2.10 | 16.60 | 0.002* |
Short-axis diameter (mm) | 4.98 | 1.97 | 4.70 | 2.00 | 8.30 | 4.26 | 2.04 | 3.60 | 1.30 | 10.10 | 0.118 |
Irregularity index | 2.30 | 1.10 | 1.94 | 1.10 | 5.09 | 1.92 | 2.27 | 1.49 | 0.93 | 16.62 | 0.007* |
Mean density | − 501.08 | 113.50 | − 473.95 | − 673.40 | − 261.30 | − 470.68 | 120.10 | − 446.50 | − 824.20 | − 261.30 | 0.201 |
Maximum density | − 263.50 | 123.46 | − 278.00 | − 532.00 | − 6.00 | − 307.71 | 149.13 | − 266.00 | − 689.00 | − 65.00 | 0.351 |
Minimum density | − 764.96 | 104.84 | − 782.50 | − 1,015.00 | − 584.00 | − 743.35 | 109.44 | − 752.00 | − 989.00 | − 470.00 | 0.403 |
Std density | 99.60 | 23.86 | 100.35 | 51.10 | 154.30 | 103.95 | 40.86 | 98.15 | 43.70 | 190.00 | 0.952 |
Peak frequency% | 18.25 | 7.81 | 17.00 | 9.00 | 41.00 | 21.13 | 6.26 | 21.00 | 10.00 | 35.00 | 0.022* |