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Table 6 Competing risk regression analysis for cancer survival among Aboriginal and matched non-Aboriginal cohorts, South Australia 1990–2010

From: Disparities in breast screening, stage at diagnosis, cancer treatment and the subsequent risk of cancer death: a retrospective, matched cohort of aboriginal and non-aboriginal women with breast cancer

  Model 4 - treated Model 5 - treated (with mastectomy)
Subhazard Risk Ratio 95% CIs z p > |z| Subhazard Risk Ratio 95% CIs z p > |z|
Aboriginal
 No         
 Yes         
Stage at diagnosis
 Local 1.00 Reference    1.00 Reference   
  Regional 34.23 6.76–173.40 4.27 0.000 48.81 3.63–655.42 2.93 0.003
 Distant or Unknown 49.67 6.79–363.51 3.85 0.000 69.21 4.21–1138.25 2.97 0.003
Listed with BSSA
 No         
 Yes         
Screened by BSSA
 No 1.00 Reference    1.00 Reference   
 Yes 0.07 0.01–0.83 −2.11 0.035 0.05 0.01–0.40 −2.78 0.005
Systemic therapy
 No 1.00 Reference    1.00 Reference   
 Yes 0.06 0.01–0.41 −2.88 0.004 0.05 0.01–0.21 −4.11 0.000
Surgical treatment
 No 1.00 Reference       
 Yes 0.17 0.04–0.74 −2.36 0.018     
Mastectomy
 No mastectomy      1.00 Reference   
 Partial      0.10 0.01–0.88 −2.08 0.038
 Simple/ subcutaneous      0.23 0.06–0.86 −2.19 0.029
 AIC 28.9     28.9