Table 1 Patient characteristics
Characteristic | n | Radiotherapy | p | ||
|---|---|---|---|---|---|
No (%) | Preoperative (%) | Postoperative (%) | |||
Sex | |||||
Male | 198 | 35 (66.0) | 89 (64.5) | 74 (73.3) | 0.341 |
Female | 94 | 18 (34.0) | 49 (35.5) | 27 (26.7) | |
Age | |||||
Mean ± SD (years) | 57 ± 16.8 | 67 ± 17.2 | 54 ± 16.3 | 55 ± 15.2 | <0.001 |
Race | |||||
White | 224 | 40 (75.5) | 99 (71.7) | 85 (84.2) | 0.095 |
Black | 23 | 5 (9.4) | 10 (7.2) | 8 (7.9) | |
Other and unknown | 45 | 8 (15.1) | 29 (21.0) | 8 (7.9) | |
Tumor grade | |||||
G1–2 | 20 | 3 (5.7) | 7 (5.1) | 10 (9.9) | 0.118 |
G3–4 | 237 | 47 (88.7) | 108 (78.3) | 82 (81.2) | |
Unknown | 35 | 3 (5.7) | 23 (16.7) | 9 (8.9) | |
Tumor size (mm) | |||||
Mean ± SD | 53.5 ± 25.1 | 55.4 ± 26.6 | 53.3 ± 25.6 | 52.8 ± 23.9 | 0.835 |
Number of RLNs (n) | |||||
Mean ± SD | 14.8 ± 11.6 | 13.3 ± 10.0 | 13.9 ± 10.1 | 16.9 ± 13.9 | 0.080 |
Number of PLNs (n) | |||||
Mean ± SD | 6.7 ± 7.2 | 8.3 ± 9.2 | 5.2 ± 5.8 | 7.9 ± 7.2 | 0.003 |
Tumor stage | |||||
II | 51 | 11 (20.8) | 29 (21.0) | 11 (10.9) | 0.099 |
III | 241 | 42 (79.2) | 109 (79.0) | 90 (89.1) | |