Table 3.
Demographic and clinical characteristics by competing event risk strata
| Characteristic | Low | Medium | High | P value* |
|---|---|---|---|---|
| Patients, n | 4193 | 4188 | 4196 | |
| Mean age at diagnosis, y (SD) | 72 (5) | 74 (6) | 79 (6) | <.001 |
| Race, n (%) | ||||
| White | 3724 (88.8) | 3767 (89.9) | 3785 (90.2) | .08 |
| Black | 249 (5.9) | 217 (5.2) | 227 (5.4) | .29 |
| Other | 220 (5.2) | 204 (4.9) | 184 (4.4) | .18 |
| Married, n (%) | 2461 (58.7) | 1979 (47.3) | 1252 (29.8) | <.001 |
| Higher SES, n (%)† | 1465 (34.9) | 1395 (33.3) | 1195 (28.5) | <.001 |
| Stage, n (%) | ||||
| IA | 1728 (41.2) | 2918 (69.7) | 3441 (82) | <.001 |
| IB | 1535 (36.6) | 851 (20.3) | 570 (13.6) | <.001 |
| IIA/II NOS | 561 (13.4) | 256 (6.1) | 110 (2.6) | <.001 |
| II | 369 (8.8) | 163 (3.9) | 75 (1.8) | <.001 |
| Grade, n (%) | ||||
| 1 | 429 (10.2) | 1979 (47.3) | 3088 (73.6) | <.001 |
| 2 | 2049 (48.9) | 1738 (41.5) | 967 (23.0) | <.001 |
| 3 | 1715 (40.9) | 471 (11.2) | 141 (3.4) | <.001 |
| Lymphadenectomy, n (%) | ||||
| 0 nodes | 896 (21.4) | 1970 (47.0) | 2963 (70.6) | <.001 |
| 1–10 nodes | 1380 (32.9) | 1016 (24.3) | 596 (14.2) | <.001 |
| >10 nodes | 1917 (45.7) | 1202 (28.7) | 637 (15.2) | <.001 |
| Charlson Comorbidity Index, n (%) | ||||
| 0 | 3906 (93.2) | 3649 (87.1) | 3056 (72.8) | <.001 |
| 1 | 244 (5.8) | 429 (10.3) | 822 (19.6) | <.001 |
| >1 | 43 (1.0) | 110 (2.6) | 318 (7.6) | <.001 |
Abbreviations: NOS = not otherwise specified; SD = standard deviation; SES = socioeconomic status.
*
P values for categorical and continuous variables were generated from χ2 tests and analysis of variance, respectively.
†
Higher SES = above $47,070 annual salary.