Table 1.
Demographics and clinical characteristics of patients diagnosed in 2018, 2019 and 2020.
| Characteristics | 2018 (n=47634) | 2019 (n=49792) | 2020 (n=44612) | Total (n=142038) | P value | |
|---|---|---|---|---|---|---|
| Race | <0.001 | |||||
| White | 36610 (76.9%) | 38177 (76.7%) | 33944 (76.1%) | 108731 | ||
| Black | 5104 (10.7%) | 5452 (10.9%) | 5016 (11.2%) | 15572 | ||
| Other | 5479 (11.5%) | 5728 (11.5%) | 5120 (11.5%) | 16327 | ||
| Unknown | 441 (0.9%) | 435 (0.9%) | 532 (1.2%) | 1408 | ||
| Age | <0.001 | |||||
| <50 | 9915 (20.8%) | 10382 (20.9%) | 9806 (22%) | 30103 | ||
| 50≤;<70 | 24514 (51.5%) | 25513 (51.2%) | 22559 (50.6%) | 72586 | ||
| ≥70 | 13205 (27.7%)_ | 13897 (27.9%) | 12247 (27.5%) | 39349 | ||
| Grade | <0.001 | |||||
| I | 10843 (22.8%) | 11200 (22.5%) | 9394 (21.1%) | 31437 | ||
| II | 21629 (45.4%) | 23182 (46.6%) | 20786 (46.6%) | 65597 | ||
| III | 14500 (30.4%) | 14729 (29.6%) | 13779 (30.9%) | 43008 | ||
| Unknown | 662 (1.4%) | 681 (1.4%) | 653 (1.5%) | 1996 | ||
| Subtype | <0.001 | |||||
| HR+/Her2- | 35728 (75%) | 38055 (76.4%) | 33422 (74.9%) | 107205 | ||
| HR+/Her2+ | 4945 (10.4%) | 4778 (9.6%) | 4526 (10.1%) | 14249 | ||
| HR-/Her2+ | 1899 (4%) | 1804 (3.6%) | 1796 (4%) | 5499 | ||
| HR-/Her2- | 4872 (10.2%) | 4931 (9.9%) | 4673 (10.5%) | 14476 | ||
| Unknown | 190 (0.4%) | 224 (0.4%) | 195 (0.4%) | 609 | ||
| Stage | <0.001 | |||||
| 0 | 33 (0.1%) | 42 (0.1%) | 52 (0.1%) | 127 | ||
| I | 34542 (72.5%) | 36723 (73.8%) | 32049 (71.8%) | 103314 | ||
| II | 6933 (14.6%) | 6773 (13.6%) | 6432 (14.4%) | 20138 | ||
| III | 3459 (7.3%) | 3539 (7.1%) | 3431 (7.7%) | 10429 | ||
| IV | 2667 (5.6%) | 2715 (5.5%) | 2648 (5.9%) | 8030 | ||
| Surgery | <0.001 | |||||
| Aspiration/biopsy only | 3087 (6.5%) | 3535 (7.1%) | 3755 (8.4%) | 10377 | ||
| Mastectomy | 16578 (34.8%) | 16734 (33.6%) | 15268 (34.2%) | 48580 | ||
| Breast conserving | 27944 (58.7%) | 29465 (59.2%) | 25554 (57.3%) | 82963 | ||
| Unknown | 25 (0.1%) | 58 (0.1%) | 35 (0.1%) | 118 | ||
| Radiation | <0.001 | |||||
| No | 19363 (40.6%) | 20700 (41.6%) | 19526 (43.8%) | 59589 | ||
| Yes | 28271 (59.4%) | 29092 (58.4%) | 25086 (56.2%) | 82449 | ||
| Chemotherapy | <0.001 | |||||
| No | 28797 (60.5%) | 30675 (61.6%) | 26258 (58.9%) | 85730 | ||
| Yes | 18837 (39.5%) | 19117 (38.4%) | 18354 (41.1%) | 56308 | ||
| Time to treatment initiation (month) | <0.001 | |||||
| ≤1 | 32374 (68%) | 33091 (66.5%) | 31063 (69.6%) | 96528 | ||
| >1 | 15260 (32%) | 16701 (33.5%) | 13549 (30.4%) | 45510 |