Subgroup Analysis
| No. of patients | PET/CTSUV 3.5 volume (cm3) | Pathologic volume (cm3) | Log (PET/CTSUV 3.5 volume, mm3) | Log (pathologic volume, mm3) | Correlation | ||
|---|---|---|---|---|---|---|---|
| Subgroup | R | R2 | |||||
| Total | 61 | 10.8 ± 18.1 | 9.2 ± 15.4 | 3.47 ± 0.92 | 3.4 ± 0.86 | 0.65 | 0.42 |
| T stage | |||||||
| T1 | 27 | 3.1 ± 4.9 | 1.6 ± 2.3 | 3.02 ± 0.72 | 2.72 ± 0.76 | 0.73 | 0.53 |
| T2 | 24 | 8.1 ± 6.5 | 7.0 ± 5.4 | 3.73 ± 0.57 | 3.71 ± 0.32 | 0.5 | 0.25 |
| T3–T4 | 10 | 38.2 ± 31.3 | 34.8 ± 24.3 | 4.44 ± 0.31 | 4.44 ± 0.31 | 0.76 | 0.58 |
| Depth of tumor | |||||||
| <1 cm | 22 | 1.7 ± 2.3 | 0.87 ± 1.1 | 2.84 ± 0.66 | 2.52 ± 0.68 | 0.6 | 0.37 |
| 1–2 cm | 29 | 11.8 ± 14.1 | 7.2 ± 6.8 | 3.81 ± 0.58 | 3.72 ± 0.34 | 0.65 | 0.42 |
| >2 cm | 10 | 27.9 ± 32.1 | 33.2 ± 24.9 | 4.31 ± 0.43 | 4.44 ± 0.34 | 0.85 | 0.72 |
Data are mean ± SD. PET/CTSUV 3.5 volume = tumor volume calculated in PET/CT with cutoff point of SUV = 3.5; R = correlation coefficient; R2 = coefficient of determination.