Table 2.
The Ratio of Volumes of GTVMR to GTVCT in 2 Radiation Oncologists.
| Variables | N | GTVMR_RO1/GTVCT_RO1 Ratio | GTVMR_RO2/GTVCT_RO2 Ratio | ||
|---|---|---|---|---|---|
| Ratio (Mean [SD]) | P a | Ratio (Mean [SD]) | P a | ||
| Tumor size | .656 | .644 | |||
| >5 cm3 | 9 | 1.02 (0.18) | 1.05 (0.19) | ||
| <5 cm3 | 18 | 0.98 (0.29) | 1.10 (0.27) | ||
| Primary lung cancer | .114 | .174 | |||
| Yes | 18 | 1.05 (0.22) | 1.12 (0.22) | ||
| No | 9 | 0.88 (0.29) | 0.99 (0.27) | ||
| Histology | |||||
| Adenocarcinoma | .975 | .278 | |||
| Yes | 15 | 0.99 (0.22) | 1.13 (0.26) | ||
| No/unknown | 12 | 1.00 (0.30) | 1.03 (0.21) | ||
| SqCC | .387 | .689 | |||
| Yes | 7 | 1.07 (0.33) | 1.05 (0.16) | ||
| No/unknown | 21 | 0.97 (0.23) | 1.10 (0.27) | ||
| Location | |||||
| Subpleural | .119 | .326 | |||
| Yes | 16 | 0.93 (0.21) | 1.04 (0.27) | ||
| No | 11 | 1.09 (0.30) | 1.14 (0.18) | ||
| Lower lobe | .644 | .787 | |||
| Yes | 15 | 0.97 (0.26) | 1.07 (0.27) | ||
| No | 12 | 1.02 (0.26) | 1.10 (0.20) | ||
| Emphysematous lung | .650 | .886 | |||
| Yes | 6 | 1.04 (0.20) | 1.10 (0.14) | ||
| No | 21 | 0.98 (0.27) | 1.08 (0.27) | ||
| PET-CT | .510 | .498 | |||
| Yes | 17 | 1.02 (0.24) | 1.05 (0.18) | ||
| No | 10 | 0.95 (0.28) | 1.13 (0.32) | ||
Abbreviations: CT, computed tomography; GTVCT, gross target volumes were delineated on CT; GTVMR, gross target volumes were delineated on MR; PET, positron emission tomography; RO, radiation oncologist; SD, standard deviation; SqCC, squamous cell carcinoma.
a Two-tailed independent t test.