Skip to main content

Table 1 Factors associated with early versus advanced stage at diagnosis of breast cancer by ethnicity

From: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study

  NZ European Māori All cancers    
Characteristic (N = 1459) Earlya (N = 311) Earlya (N = 1846) Earlya    
  n (%) n (%) n (%) n (%) n (%) n (%) OR 95% CI p
Screening status          <0.001
  Screen detected 915 (62.7) 654 (71.5) 153 (49.2) 107 (69.9) 1106 (59.9) 786 (71.1) Ref   
  Interval 192 (13.2) 63 (32.8) 20 (6.4) 3 (15.0) 218 (11.3) 69 (31.7) 5.30 4.15-6.74  
  Non-screen 352 (24.1) 118 (33.5) 138 (44.4) 36 (26.1) 522 (28.3) 162 (31.0) 5.46 4.11-7.33  
Age group (years)          
  45-49 208 (14.3) 110 (52.9) 51 (16.4) 23 (45.1) 275 (14.9) b 143 (52.0) Ref   0.005
  50-54 375 (25.7) 206 (54.9) 77 (24.8) 31 (40.3) 469 (25.4) 245 (52.2) 0.99 0.74-1.33  
  55-59 323 (22.1) 180 (55.7) 74 (23.8) 32 (43.2) 416 (22.5) 218 (52.4) 0.98 0.73-1.33  
  60-64 337 (23.1) 196 (58.2) 73 (23.5) 36 (49.3) 425 (23.0) 241 (56.7) 0.83 0.61-1.12  
  65-69 216 (14.8) 143 (66.2) 36 (11.6) 24 (66.7) 261 (14.1) b 170 (65.1) 0.58 0.41-0.82  
Deprivation          
  Dep 1-2 184 (12.6) 101 (54.9) 9 (2.9) 1 (11.1) 203 (11.0) 108 (53.2) Ref   0.094
  Dep 3-4 157 (10.8) 104 (66.2) 23 (7.4) 13 (56.5) 186 (10.1) 120 (64.5) 0.63 0.42–0.94  
  Dep 5-6 339 (23.2) 189 (55.8) 62 (19.9) 29 (46.8) 411 (22.3) 223 (54.3) 0.96 0.68–1.34  
  Dep 7-8 492 (33.7) 279 (56.7) 95 (30.5) 43 (45.3) 614 (33.3) 338 (55.0) 0.93 0.68–1.28  
  Dep 9-10 287 (19.7) 162 (56.4) 122 (39.2) 60 (49.2) 432 (23.4) 228 (52.8) 1.02 0.73–1.42  
Residence          
  Urban 783 (53.7) 435 (55.6) 150 (48.2) 75 (50.0) 990 (53.6) 539 (54.4) Ref   0.794
  Semi-urban 370 (25.4) 222 (60.0) 107 (34.4) 50 (46.7) 492 (26.7) 277 (56.3) 0.93 0.75–1.15  
  Rural 306 (21.0) 178 (58.2) 54 (17.4) 21 (38.9) 364 (19.7) 201 (55.2) 0.97 0.76–1.23  
Year of diagnosis          
  1999-2002 249 (17.1) 128 (51.4) 44 (14.1) 20 (45.5) 300 (16.3) 153 (51.0) Ref   0.423
  2003-2006 450 (30.8) 270 (60.0) 75 (24.1) 33 (44.0) 542 (29.4) 308 (56.8) 0.79 0.60-1.05  
  2007-2009 363 (24.9) 203 (55.9) 86 (27.7) 45 (52.3) 479 (25.9) 263 (54.9) 0.86 0.64-1.14  
  2010-2012 397 (27.2) 234 (58.9) 106 (34.1) 48 (45.3) 525 (28.4) 293 (55.8) 0.82 0.62-1.09  
  1. (Characteristics of women associated with early stage [compared with advanced stage] at diagnosis of breast cancer by ethnicity for screening age women with newly diagnosed breast cancer in the Waikato, New Zealand 1999–2012).
  2. (aearly stage = in-situ & stage I, bonly cancers diagnosed from July 2004 onwards are included).