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Table 1 Characteristics of breast cancer patients by surgery pattern

From: Re-excision and survival following breast conserving surgery in early stage breast cancer patients: a population-based study

  Surgery Pattern
  BCS Alone
N (%)a
BCS, BCS
N (%)a
BCS, Mastectomy
N (%)a
Mastectomy
N (%)a
Total Patients 4572 (39) 472 (4) 615 (5) 5967 (51)
Stage
 Stage I 2920 (51) 292 (5) 264 (5) 2242 (39)
 Stage II 1412 (32) 161 (4) 267 (6) 2572 (58)
 Stage III 240 (16) 19 (1) 84 (6) 1153 (77)
Age at Diagnosis
  < 50 1205 (39) 136 (4) 227 (7) 1541 (50)
 50-59 1342 (44) 150 (5) 184 (6) 1380 (45)
 60-69 1088 (42) 114 (4) 115 (4) 1304 (50)
 70-79 676 (34) 60 (3) 66 (3) 1162 (59)
 80+ 258 (30) 12 (1) 23 (3) 580 (66)
Geography of Surgery
 Calgary 1954 (44) 175 (4) 185 (4) 2138 (48)
 Edmonton 1999 (40) 206 (4) 295 (6) 2468 (50)
 Central 192 (23) 23 (3) 46 (6) 563 (68)
 South 308 (33) 36 (4) 56 (6) 536 (57)
 North 119 (27) 32 (7) 33 (7) 262 (59)
Surgeon Volume
 Very High (60+) 2313 (44) 223 (4) 278 (5) 2485 (47)
 High (20-59) 1700 (38) 172 (4) 235 (5) 2370 (53)
 Medium (13-19) 362 (33) 55 (5) 67 (6) 623 (56)
 Low (5-12) 148 (24) 16 (3) 28 (5) 424 (69)
 Very Low (< 5) 49 (39) 6 (5) 7 (6) 65 (51)
Year of Diagnosis
 2002-2005 2083 (39) 207 (4) 296 (6) 2763 (52)
 2006-2009 2489 (40) 265 (4) 319 (5) 3204 (51)
Tumor Size
 T0 2 (14) 1 (7) 0 (0) 11 (79)
 T1 3523 (48) 358 (5) 373 (5) 3052 (42)
 T2 997 (28) 107 (3) 200 (6) 2235 (63)
 T3 34 (7) 5 (1) 38 (8) 417 (84)
 T4 16 (6) 1 (0.4) 4 (1) 252 (92)
Nodal Status
 N0 3551 (47) 353 (5) 363 (5) 3324 (44)
 N1 805 (28) 102 (4) 182 (6) 1789 (62)
 N2 159 (21) 13 (2) 43 (6) 544 (72)
 N3 57 (14) 4 (1) 27 (7) 310 (78)
ER/PR Status and Hormone Therapy
 ER/PR positive & received hormone 3035 (39) 335 (4) 431 (6) 3967 (51)
 ER/PR positive & no hormone 737 (44) 57 (3) 72 (4) 807 (48)
 ER/PR negative 800 (37) 80 (4) 112 (5) 1195 (55)
Neo-adjuvant Chemotherapy
 Not received 4509 (41) 454 (4) 537 (5) 5571 (50)
 Received 63 (13) 18 (4) 78 (16) 403 (81)
Adjuvant Chemotherapy
 Not received 3041 (42) 307 (4) 357 (5) 3540 (49)
 Received 1531 (35) 165 (4) 258 (6) 2428 (55)
  1. Abbreviations: BCS breast conserving surgery, ER estrogen receptor, PR progesterone receptor
  2. aRow percentages