Characteristics of females diagnosed with breast cancer who had mastectomies in Alberta during 2004 to 2017 and those who did and did not have breast reconstruction within 1 year
| Characteristic | No. (%) of patients* | p value | ||
|---|---|---|---|---|
| Population (females with mastectomies) n = 16 198 | Cases (females with mastectomies who had breast reconstruction within 1 yr) n = 1932 | Females with mastectomies who did not have breast reconstruction within 1 yr n = 14 266 | ||
| Age at diagnosis, yr, mean ± SD | 60.0 ± 14.1 | 49.9 ± 10.7 | 61.4 ± 13.9 | < 0.001 |
| Age group at diagnosis, yr | < 0.001 | |||
| 21–44 | 2297 (14.2) | 593 (30.7) | 1704 (11.9) | |
| 45–54 | 3891 (24.0) | 748 (38.7) | 3143 (22.0) | |
| 55–64 | 3690 (22.8) | 397 (20.5) | 3293 (23.1) | |
| ≥ 65 | 6320 (39.0) | 194 (10.0) | 6126 (42.9) | |
| Year of diagnosis | < 0.001 | |||
| 2004–2010 | 8165 (50.4) | 788 (40.8) | 7377 (51.7) | |
| 2011–2017 | 8033 (49.6) | 1144 (59.2) | 6889 (48.3) | |
| Zone | < 0.001 | |||
| North | 1545 (9.5) | 106 (5.5) | 1439 (10.1) | |
| Edmonton | 5049 (31.2) | 476 (24.6) | 4573 (32.1) | |
| Central | 2385 (14.7) | 193 (10.0) | 2192 (15.4) | |
| Calgary | 5796 (35.8) | 1043 (54.0) | 4753 (33.3) | |
| South | 1423 (8.8) | 114 (5.9) | 1309 (9.2) | |
| Neighbourhood income quintile | < 0.001 | |||
| 1 (lowest) | 2905 (17.9) | 236 (12.2) | 2669 (18.7) | |
| 2 | 3096 (19.1) | 306 (15.8) | 2790 (19.6) | |
| 3 | 3319 (20.5) | 393 (20.3) | 2926 (20.5) | |
| 4 | 3347 (20.7) | 447 (23.1) | 2900 (20.3) | |
| 5 (highest) | 3438 (21.2) | 540 (28.0) | 2898 (20.3) | |
| Missing | 93 (0.6) | 10 (0.5) | 83 (0.6) | |
| Community size | < 0.001 | |||
| < 10 000 | 3609 (22.3) | 301 (15.6) | 3308 (23.2) | |
| 10 000–99 999 | 2441 (15.1) | 215 (11.1) | 2226 (15.6) | |
| ≥ 100 000 | 10 144 (62.6) | 1416 (73.3) | 8728 (61.2) | |
| Missing | 4 (0.0) | 0 (0.0) | 4 (0.0) | |
| ≥ 1 comorbidity | < 0.001 | |||
| Yes | 3066 (18.9) | 172 (8.9) | 2894 (20.3) | |
| Stage | < 0.001 | |||
| 0 | 1562 (9.6) | 537 (27.8) | 1025 (7.2) | |
| I | 5177 (32.0) | 760 (39.3) | 4417 (31.0) | |
| II | 6001 (37.1) | 457 (23.7) | 5544 (38.9) | |
| III | 2763 (17.1) | 106 (5.5) | 2657 (18.6) | |
| IV | 344 (2.1) | 15 (0.8) | 329 (2.3) | |
| Unknown | 174 (1.1) | 15 (0.8) | 159 (1.1) | |
| NA | 177 (1.1) | 42 (2.2) | 135 (0.9) | |
| Chemotherapy | ||||
| Before mastectomy | 1703 (10.5) | 204 (10.6) | 1499 (10.5) | > 0.9 |
| After mastectomy | 5298 (32.7) | 447 (23.1) | 4851 (34.0) | < 0.001 |
| Radiotherapy | ||||
| After mastectomy | 525 (3.2) | 31 (1.6) | 494 (3.5) | < 0.001 |
NA = not applicable; SD = standard deviation.
↵* Unless stated otherwise.