Table 1.
Baseline patient characteristics
| Characteristic | CBCT (n = 76) | Orthogonal kV (n = 48) | P |
|---|---|---|---|
|
| |||
| Age (y) | |||
| Median | 64 | 66 | .58 |
| Range | 40–83 | 44–89 | |
| Sex | .11 | ||
| Male | 46 (61) | 22 (46) | |
| Female | 30 (39) | 26 (54) | |
| Race | .76 | ||
| Caucasian | 64 (84) | 39 (81) | |
| African American | 6 (8) | 6 (13) | |
| Other | 6 (8) | 3 (6) | |
| ECOG | .22 | ||
| 0 | 45 (59) | 37 (77) | |
| 1 | 22 (29) | 7 (15) | |
| 2 | 7 (9) | 3 (6) | |
| 3 | 2 (3) | 1 (2) | |
| Smoking (pack-years) | |||
| Median | 40 | 39 | .63 |
| Range | 0–168 | 0–125 | |
| Histology | .52 | ||
| Adenocarcinoma | 38 (50) | 28 (58) | |
| Squamous cell carcinoma | 29 (38) | 17 (35) | |
| Poorly differentiated carcinoma | 9 (12) | 3 (6) | |
| Tumor lobe location | .20 | ||
| Upper/middle | 54 (71) | 39 (81) | |
| Lower | 22 (29) | 9 (19) | |
| Clinical stage | .72 | ||
| IIA | 5 (7) | 2 (4) | |
| IIB | 3 (4) | 1 (2) | |
| IIIA | 23 (30) | 17 (35) | |
| IIIB | 35 (46) | 25 (52) | |
| IV | 10 (13) | 3 (6) | |
| T stage | .37 | ||
| X | 2 (3) | 1 (2) | |
| 1 | 17 (22) | 7 (15) | |
| 2 | 16 (21) | 18 (38) | |
| 3 | 16 (21) | 9 (19) | |
| 4 | 26 (34) | 13 (27) | |
| N stage | .71 | ||
| 0 | 5 (7) | 2 (4) | |
| 1 | 11 (14) | 4 (8) | |
| 2 | 32 (42) | 24 (50) | |
| 3 | 28 (37) | 18 (38) | |
Abbreviations: CBCT = cone beam computed tomography; ECOG = Eastern Cooperative Oncology Group; kV = kilovoltage.
Values are number (percentage) unless otherwise noted.