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Table 2 Number (%) of patients receiving treatment by stage at diagnosis, 1980-2006.

From: Breast cancer treatment and ethnicity in British Columbia, Canada

   Ethnic Group   
Stage* Treatment Chinese South Asian Iranian P-value General Population
I   n = 808 n = 271 n = 52   n = 15,813
  Radiation 481 (59.5) 191 (70.5) 39 (75.0) 0.001 10,476 (66.2)
  Surgery 787 (97.4) 265 (97.8) 50 (96.2) 0.787 14,981 (94.7)
     Surgery with radiation 477 (59.0) 189 (69.7) 37 (71.2) 0.003 10,266 (64.9)
     Surgery without radiation 310 (38.4) 76 (28.0) 13 (25.0) 0.002 4,715 (29.8)
  Chemotherapy 158 (19.6) 57 (21.0) 9 (17.3) 0.781 2,027 (12.8)
  Hormone therapy 405 (50.1) 115 (42.4) 23 (44.2) 0.077 6,549 (41.4)
II   n = 695 n = 395 n = 53   n = 16,137
  Radiation 468 (67.3) 294 (74.4) 45 (84.9) 0.003 11,163 (69.2)
  Surgery 667 (96.0) 380 (96.2) 53 (100.0) 0.331 14,784 (91.6)
     Surgery with radiation 458 (65.9) 291 (73.7) 45 (84.9) 0.001 10,720 (66.4)
     Surgery without radiation 209 (30.1) 89 (22.5) 8 (15.1) 0.004 4,064 (25.2)
  Chemotherapy 455 (65.5) 260 (65.8) 41 (77.4) 0.208 7,503 (46.5)
  Hormone therapy 408 (58.7) 236 (59.7) 31 (58.5) 0.942 9,363 (58.0)
III   n = 103 n = 69 n = 6   n = 3,690
  Radiation 91 (88.3) 62 (89.9) 6 (100.0) 0.657 3,124 (84.7)
  Surgery 95 (92.2) 64 (92.8) 6 (100.0) 0.777 2,921 (79.2)
     Surgery with radiation 84 (81.6) 60 (87.0) 6 (100.0) 0.355 2,634 (71.4)
     Surgery without radiation 11 (10.7) 4 (5.8) 0 (0.0) 0.397 287 (7.8)
  Chemotherapy 87 (84.5) 57 (82.6) 6 (100.0) 0.531 2,449 (66.4)
  Hormone therapy 75 (72.8) 40 (58.0) 4 (66.7) 0.128 2,199 (59.6)
IV   n = 153 n = 97 n = 8   n = 2,040
  Radiation 119 (77.8) 77 (79.4) 6 (75.0) 0.931 1,437 (70.4)
  Surgery 93 (60.8) 58 (59.8) 4 (50.0) 0.830 878 (43.0)
     Surgery with radiation 79 (51.6) 47 (48.5) 3 (37.5) 0.685 643 (31.5)
     Surgery without radiation 14 (9.2) 11 (11.3) 1 (12.5) 0.832 235 (11.5)
  Chemotherapy 95 (62.1) 59 (60.8) 5 (62.5) 0.979 867 (42.5)
  Hormone therapy 95 (62.1) 62 (63.9) 5 (62.5) 0.958 1,302 (63.8)
  1. * non-missing values only