Article Figures & Tables
Tables
- Table 1: Mastectomy and breast-conserving surgery among women with unilateral invasive breast cancer, index versus final procedure* in Canada (n = 56 892), by province, 2007/08 to 2009/10
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.
- Table 2: Demographic factors associated with mastectomy rates in Canada* (n = 40 875), 2007/08 to 2009/10
Variable No. (%)† of women Mastectomy rate, % Adjusted‡
odds ratio95% CI Travel time, min 0–39 24 161 (59) 40 1.0 (ref) – 40–89 7 884 (19) 46 1.3 (1.2–1.4) 90–179 5 131 (13) 52 1.6 (1.5–1.7) ≥ 180 3 699 (9) 57 1.9 (1.8–2.0) Age, yr 18–49 8 708 (21) 48 1.0 (ref) – 50–59 10 165 (25) 40 0.7 (0.66–0.74) 60–69 10 346 (25) 40 0.7 (0.65–0.73) ≥ 70 11 656 (29) 48 1.0 (0.92–1.03) Neighbourhood income quintile 1 (least affluent) 6 273 (15) 49 1.3 (1.2–1.4) 2 7 620 (19) 47 1.2 (1.1–1.3) 3 8 216 (20) 45 1.1 (1.1–1.2) 4 8 912 (22) 43 1.1 (1.0–1.20) 5 (most affluent) 9 854 (24) 39 1.0 (ref) – Note: CI = confidence interval. *Quebec, Yukon, Northwest Territories and Nunavut were not included in this analysis. †Women for whom age, neighbourhood income quintile or travel time could not be calculated (n = 972) were excluded. ‡Adjusted for age, neighbourhood income quintile and travel time.
- Table 3: Crude and adjusted final mastectomy rates among women in Canada* with unilateral invasive breast cancer (n = 40 875), 2007/08 to 2009/10, by province
Procedure No. of women†‡ BC AB SK MB ON NB NS PEI NL Canada Breast-conserving surgery 3 857 2 161 574 1 247 13 180 712 768 98 262 22 859 Mastectomy 3 279 2 724 1 076 712 7 920 626 965 140 574 18 016 Total 7 136 4 885 1 650 1 959 21 100 1 338 1 733 238 836 40 875 Crude§ mastectomy rate, % 46 56 65 36 38 47 56 59 69 44 Adjusted¶ mastectomy rate, % 45 56 60 35 39 41 52 56 61 NA Note: NA = not applicable. *Quebec, Yukon, Northwest Territories and Nunavut were not included in this analysis. †Unless otherwise stated. ‡Women for whom age, neighbourhood income quintile or travel time could not be calculated (n = 972) were excluded. §Crude rates in this table differ from those presented in Table 2 because of exclusions from the logistic regression. ¶Adjusted for age, neighbourhood income quintile and travel time.
- Table 4: Rates of re-excision among women who underwent breast-conserving surgery for invasive breast cancer as the index procedure (n = 38 517), by province, 2007/08 to 2009/10
Procedure No. of women* BC AB SK MB ON QC NB NS PEI NL Canada Index breast-conserving surgery 4 877 2 490 790 1 396 14 738 11 792 837 928 133 481 38 517 Re-excision Breast-conserving surgery 995 229 176 46 1 756 1 237 137 109 19 67 4 776 Mastectomy 837 286 114 198 1 325 813 118 134 33 204 4 078 Total 1 832 515 290 244 3 081 2 050 255 243 52 271 8 854 Re-excision rate, % 38 21 37 17 21 17 30 26 39 56 23 *Unless otherwise stated.
- Table 5: Location of index surgical procedure among women with unilateral breast cancer (n = 56 992), by province, 2007/08 to 2009/10
Procedure No. of women* BC Alta. Sask. Man. Ont. Que. NB NS PEI NL Canada Index breast-conserving surgery Day surgery 3 108 1 104 462 1 026 11 973 7 715 544 626 55 414 27 053 Inpatient 1 769 1 386 328 370 2 765 4 077 293 302 78 67 11 464 Total 4 877 2 490 790 1 396 14 738 11 792 837 928 133 481 38 517 Index mastectomy Day surgery 169 35 < 5† 134 2 203 784 135 114 < 5† 32 3 609 Inpatient 2 427 2 447 893 473 4 516 2 354 386 729 107 374 14 766 Total 2 596 2 482 896 607 6 719 3 138 521 843 107 406 18 375 *Unless otherwise stated. †Data suppressed because of small cell size.
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