| Procedure | No. of women† | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| BC | AB | SK | MB | ON | QC | NB | NS | PEI | NL | Canada | |
| Index procedure | |||||||||||
| Breast-conserving surgery | 4 877 | 2 490 | 790 | 1 396 | 14 738 | 11 792 | 837 | 928 | 133 | 481 | 38 517 |
| Mastectomy | 2 596 | 2 482 | 896 | 607 | 6 719 | 3 138 | 521 | 843 | 107 | 406 | 18 375 |
| Total | 7 473 | 4 972 | 1 686 | 2 003 | 21 457 | 14 930 | 1 358 | 1 771 | 240 | 887 | 56 892 |
| Index mastectomy rate, % (95% CI) | 35 (33.6–35.8) | 50 (48.5– 51.3) | 53 (50.7–55.5) | 30 (28.2–32.3) | 31 (30.6–31.9) | 21 (20.3–21.6) | 38 (35.7–40.9) | 48 (45.2–49.9) | 45 (38.2–50.8) | 46 (42.4–49.0) | 32 (31.9–32.6) |
| Final procedure | |||||||||||
| Breast-conserving surgery | 4 040 | 2 204 | 592 | 1 282 | 13 413 | 10 979 | 719 | 794 | 100 | 277 | 34 439 |
| Mastectomy | 3 433 | 2 767 | 1 094 | 721 | 8 045 | 3 951 | 639 | 977 | 141 | 609 | 22 453 |
| Total | 7 473 | 4 971 | 1 686 | 2 003 | 21 458 | 14 930 | 1 358 | 1 771 | 241 | 886 | 56 892 |
| Final mastectomy rate, % (95% CI) | 46 (44.8–47.0) | 56 (54.2–57.0) | 65 (62.6–67.1) | 36 (33.8–38.0) | 37 (36.8–38.1) | 26 (25.7–27.1) | 47 (44.3–49.7) | 55 (52.8–57.4) | 59 (52.2–64.7) | 69 (65.6–71.7) | 39 (39.0–39.8) |
Note: CI = confidence interval. *Small differences between the totals for the index and final procedures for selected provinces are because of women moving to another province during the treatment period. †Unless otherwise stated.