Table 5.
Baseline patient characteristics with respect to kV image use.
| < 90% kV imaging | ≥ 90% kV imaging | P value | |
|---|---|---|---|
| Median | |||
| Age (y) | 64.4 | 64.4 | 0.92 |
| Total dose (cGy) | 3000 | 2000 | 0.17 |
| Frequency | |||
| Histology | 0.07 | ||
| Prostate | 50 | 11 | |
| Breast | 42 | 26 | |
| NSCLC | 45 | 14 | |
| Small cell lung cancer | 1 | 2 | |
| Renal | 19 | 4 | |
| Bladder | 4 | 1 | |
| Esophagus/Gastric | 2 | 2 | |
| Melanoma | 9 | 0 | |
| Colorectal | 3 | 5 | |
| Sarcoma | 4 | 1 | |
| Myeloma/Lymphoma | 2 | 1 | |
| HCC | 1 | 0 | |
| H&N | 3 | 1 | |
| Gyn | 2 | 0 | |
| Gender | 0.15 | ||
| Female | 98 | 43 | |
| Male | 90 | 26 | |
| Extension beyond bone | 0.82 | ||
| Yes | 112 | 40 | |
| No | 76 | 29 | |
| Disease site | 0.98 | ||
| Spine | 87 | 31 | |
| Upper extremities | 16 | 6 | |
| Lower extremities/pelvis | 70 | 27 | |
| Ribs/chest wall | 13 | 5 | |