Increasing rates of surgical treatment and preventing comorbidities may increase breast cancer survival for Aboriginal women

Table 4 Hazard ratios for 279 Aboriginal women dying from breast cancer compared with 26483 non-Aboriginal women

Covariate(s) adjusted for^a	Hazard ratio^b	95% Confidence interval	p-value
Aboriginal	1.69	1.22-2.25	0.002
+ Age at diagnosis	1.88	1.36-2.51	<0.001
+ Year of diagnosis	1.88	1.36-2.51	<0.001
+ Spread of disease	1.67	1.21-2.23	0.002
+ Surgery	1.39	1.01-1.86	0.045
+ Comorbidities^c	1.34	0.97-1.79	0.075
+ Socioeconomic disadvantage	1.30	0.94-1.74	0.109
+ Place of residence	1.30	0.94-1.75	0.105

^aCovariates are entered sequentially and categories for each variable are as shown in Table 3. All subsequent models include the covariates from the previous model.
^bFor Aboriginal women compared with non-Aboriginal women.
^cComorbidities include the presence of absence of: diabetes, cardiovascular disease, chronic pulmonary disease and any other (non-cancer) comorbidity in the Charlson Comorbidity Index.

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