Cancer treatment and the risk of cancer death among Aboriginal and non-Aboriginal South Australians: analysis of a matched cohort study

Table 5 Competing risk regression analyses for cancer survival among Aboriginal and matched non- Indigenous cohorts by discrete treatment type, Models 5 and 6

	Model 5 - surgery and systemic and radiotherapies among cohorts			Model 6 - no surgery or systemic or radiotherapies among cohorts
	Subhazard Risk Ratio	95% CI	p > \|z\|	Subhazard Risk Ratio	95% CI	p > \|z\|
Aboriginal x geographic remoteness non-Indigenous
not Remote	0.69	0.58–0.82	<0.001	0.70	0.59–0.83	<0.001
Remote	0.87	0.39–1.93	0.73	0.93	0.42–2.08	0.86
Aboriginal
not Remote	1.00	Reference		1.00	Reference
Remote	1.75	1.21–2.54	<0.01	1.64	1.12–2.40	<0.01
Comorbidity score (Elixhauser)
0–3	1.00	Reference		1.00	Reference
4+	1.53	1.04–2.24	0.03	1.57	1.07–2.32	0.02
Stage x treatment modality
Local stage with/without treatment modality	0.38	0.24–0.58	<0.001
Not local stage with treatment modality	1.00	Reference
Not local stage without treatment modality	1.62	1.09–2.41	0.02
Stage x treatment modality
Local stage with/without any of treatment modalities				0.28	0.21–0.38	<0.001
Not local stage receiving none of the treatment modalities				1.82	1.26–2.63	<0.01
Not local stage receiving any of the treatment modalities				1.00	Reference
BIC	644.7			641.4

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