Table 4. Comparison of different CT values and nodule sizes between MIA and IAC appearing as PSNs.
| Variable | MIA (n=10) | IAC (n=70) | P value |
|---|---|---|---|
| CT value of GGC (HU) | −630.0±34.1 | −612.0±66.7 | 0.407 |
| rCT value 1 of GGC (HU) | 282.6±11.8 | 301.5±63.3 | 0.029* |
| rCT value 2 of GGC | 0.69±0.02 | 0.67±0.07 | 0.042* |
| CT value of SC (HU) | −89.79±15.34 | −49.8±61.94 | 0.047* |
| rCT value 1 of SC (HU) | 822.81±48.07 | 863.67±83.4 | 0.135 |
| rCT value 2 of SC | 0.10±0.02 | 0.06±0.07 | 0.067 |
| Size of PSN (cm) | 1.88±0.60 | 1.95±0.62 | 0.736 |
| Size of SC (cm) | 0.84±0.43 | 0.90±0.49 | 0.711 |
| SC/GGC ratio | 0.44±0.16 | 0.45±0.17 | 0.854 |
| CT value of lung (HU) | −912.6±34 | −913.5±26 | 0.923 |
Cases of nodules shown in brackets. *, P<0.05. CT, computed tomography; GGC, ground-glass component; HU, Hounsfield units; PSN, part-solid nodule; SC, solid component.