Table 1 Patient characteristics
Variables | n | no-RT (%) | RT (%) | p |
|---|---|---|---|---|
Age (years) | ||||
< 50 | 682 | 112 (26.5) | 570 (28.2) | 0.512 |
≥ 50 | 1760 | 310 (73.5) | 1450 (71.8) | |
Race/ethnicity | ||||
Non-Hispanic white | 2098 | 357 (84.6) | 1741 (86.2) | 0.463 |
Non-Hispanic black | 103 | 21 (5.0) | 82 (4.1) | |
Hispanic | 133 | 28 (6.6) | 105 (5.2) | |
Other | 108 | 16 (3.8) | 92 (4.6) | |
Grade | ||||
Well differentiated | 2244 | 380 (90.0) | 1864 (92.2) | 0.012 |
Moderately differentiated | 176 | 33 (7.8) | 143 (7.1) | |
Poorly/undifferentiated | 22 | 9 (2.1) | 13 (0.6) | |
Tumor size | ||||
T1mic | 22 | 6 (1.4) | 16 (0.8) | 0.444 |
T1a | 662 | 122 (28.9) | 540 (26.7) | |
T1b | 1154 | 196 (46.4) | 958 (47.4) | |
T1c | 604 | 98 (23.2) | 506 (25.0) | |
PR status | ||||
Negative | 328 | 47 (11.1) | 281 (13.9) | 0.136 |
Positive | 2114 | 375 (88.9) | 1739 (86.1) | |
Chemotherapy | ||||
No/unknown | 2302 | 391 (92.7) | 1911 (94.6) | 0.134 |
Yes | 140 | 31 (7.3) | 109 (5.4) | |