Table 2 Stratified multivariable Cox regression models for 1-year mortality in 30-day survivors, Aboriginal and non-Aboriginal patients

Age

1.04

1.03–1.05

<0.001

1.00

0.99–1.02

0.62

Female sex

0.89

0.81–0.97

0.010

0.97

0.64–1.45

0.87

2000–2002

1.00

1.00

2003–2005

0.94

0.85–1.05

0.272

1.21

0.71–2.07

0.479

2006–2008

0.87

0.78–0.97

0.010

1.44

0.85–2.41

0.149

Metropolitan residence

1.00

1.00

Rural residence

1.16

1.03–1.31

0.012

0.75

0.41–1.38

0.354

No private medical insurance

1.15

1.04–1.27

0.007

0.88

0.12–6.62

0.904

SEIFA - 1st quintile (least disadvantaged)

1.00

1.00

2nd quintile

0.97

0.76–1.24

0.793

0.69

0.31–1.54

0.363

3rd quintile

0.98

0.77–1.24

0.844

0.37

0.18–0.75

0.006

4th quintile

1.03

0.80–1.32

0.837

0.70

0.32–1.53

0.372

5th quintile

1.07

0.83–1.38

0.606

0.84

0.24–2.95

0.787

Emergency admission

1.54

1.18–2.00

0.001

1.61

0.38–6.75

0.515

Comorbidities

Hypertension

0.83

0.75–0.91

<0.001

0.41

0.25–0.68

<0.001

Atrial fibrillation

0.96

0.87–1.04

0.313

0.96

0.57–1.62

0.885

Rheumatic heart disease

1.28

1.00–1.65

0.051

0.31

0.07–1.35

0.119

Diabetes^a

0.72

0.64–0.80

<0.001

1.00

0.56–1.80

0.999

Chronic kidney disease^a

1.24

1.11–1.39

<0.001

0.64

0.37–1.11

0.116

Renal failure^a

1.36

1.10–1.69

0.005

1.54

0.85–2.80

0.157

Acute myocardial infarction

1.32

1.17–1.48

<0.001

1.55

0.91–2.64

0.109

Ischaemic heart disease

0.87

0.79–0.96

0.006

1.08

0.68–1.71

0.754

Cerebrovascular disease

1.01

0.89–1.15

0.848

1.21

0.63–2.35

0.567

Charlson comorbidity index

1.20

1.18–1.23

<0.001

1.26

1.14–1.39

<0.001

All valvular heart disease

1.02

0.92–1.12

0.745

1.10

0.65–1.87

0.719

COPD

1.11

1.00–1.22

0.047

1.01

0.66–1.54

0.962

PCI (history or 1st admission)

0.66

0.54–0.80

0.000

0.17

0.04–0.73

0.017

CABG (history or 1st admission)

0.65

0.51–0.83

0.001

0.37

0.09–1.60

0.186