Table 1.
Baseline Characteristics between Treatment Groups
| Observation Only N = 120 |
Adjuvant Chemoradiation (CRT) Therapy N = 66 |
P-Value | |
|---|---|---|---|
| DEMOGRAPHIC | |||
| Age at Surgery (yr) | |||
| Mean, (SD*) | 68.9 (11.6) | 62.0 (10.8) | <0.001 |
| Median (Range) | 71.3 (28.7-90.3) | 63.3 (29.3-81.5) | |
| Gender | |||
| Male, No. (%) | 66 (55.0) | 43 (65.2) | 0.179 |
| Institution | |||
| Mayo Clinic | 63 (52.5) | 19 (28.8) | 0.002 |
| Johns Hopkins Hospital (JHH) | 57 (47.5) | 47 (71.2) | |
| TUMOR CHARACTERISTCS | |||
| T Stage | |||
| 1 | 37 (30.8) | 8 (12.1) | 0.002 |
| 2 | 46 (38.3) | 20 (30.3) | |
| 3 | 33 (27.5) | 34 (51.5) | |
| 4 | 4 (3.3) | 4 (6.1) | |
| Tumor Diameter | |||
| < 3 cm | 81 (67.5) | 39 (59.1) | 0.251 |
| ≥ 3 cm | 39 (32.5) | 27 (40.9) | |
| Nodal Status | |||
| N0 | 84 (70.0) | 18 (27.3) | <0.001 |
| N1 | 36 (30.0) | 48 (72.3) | |
| Histologic Grading | |||
| 1 | 8 (6.7) | 0 (0.0) | 0.053 |
| 2 | 52 (43.3) | 25 (37.9) | |
| 3 | 60 (50.0) | 41 (62.1) | |
| Surgical Margins | |||
| Positive | 0 (0.0) | 3 (4.6) | 0.019 |
| Negative | 120 (100.0) | 63 (95.4) | |
*SD = standard deviation