Table 1

Individual and hospital characteristics of Aboriginal and non-Aboriginal people admitted with acute myocardial infarction
Aboriginal (n = 1183) Non- Aboriginal (n = 58877) χ2p-value
N % N %
Individual characteristic
Age group
 25-34 47 4.0 421 0.7 <.001
 35-44 257 21.7 2829 4.8
 45-54 360 30.4 8579 14.6
 55-64 265 22.4 13144 22.3
 65-74 180 15.2 15410 26.2
 75-84 74 6.3 18481 31.4
Sex
 Male 727 61.5 39950 67.9 <.001
 Female 456 38.5 18914 32.1
Comorbid conditionsa
 Diabetes with     complications 279 23.6 8903 15.1 <.001
 Cardiac dysrhythmias 185 15.6 12539 21.3 <.001
 Congestive heart failure 154 13.0 8350 14.2 .254
 Pulmonary disease 136 11.5 5236 8.9 .002
 Chronic renal failure 96 8.1 4143 7.0 .152
 Acute renal failure 47 4.0 2729 4.6 .282
 Cerebrovascular     disease 36 3.0 2552 4.3 .030
 Paraplegia 25 2.1 1341 2.3 .707
 Cancer 15 1.3 1773 3.0 0.01
 Peripheral vascular     disease 12 1.0 1108 1.9 .029
 Shock 11 0.9 1195 2.0 .008
 Pulmonary oedema 9 0.8 685 1.2 .199
 Connective tissue     disorder 8 0.7 743 1.3 .073
 Dementia 5 0.4 506 0.9 .105
 Severe liver disease 2 0.2 103 0.2 .962
 Liver disease 1 0.1 113 0.2 .615
Socio-economic statusb
 1st quintile - least  disadvantaged 23 1.9 7832 13.3 <.001
 2nd quintile 109 9.2 9946 16.9
 3rd quintile 186 15.7 12726 21.6
 4th quintile 299 25.3 13102 22.3
 5th quintile - most  disadvantaged 566 47.8 15258 25.9
Remoteness of residencec
 Major city 307 26.0 34695 58.9 <.001
 Inner regional 359 30.3 16319 27.7
 Outer regional 366 30.9 7300 12.4
 Remote/very remote 151 12.8 550 0.9
Hospital characteristic
Remoteness of hospitalc
 Major city 389 32.9 39456 67.0 <.001
 Inner regional 247 20.9 11384 19.3
 Outer regional 414 35.0 7297 12.4
 Remote/very remote 133 11.2 726 1.2
Average acute admissions per year
 Less than 1200 88 7.4 1245 2.1 <.001
 1200-3899 182 15.4 3730 6.3
 3900-7084 138 11.7 3842 6.5
 7085-18399 443 37.4 19977 33.9
 18400 or more 332 28.1 30070 51.1
On-site angiography
 Yes 315 26.6 25694 43.6 <.001
 No 868 73.4 33170 56.4

a Comorbid conditions with one-year look-back, including comorbidities on current admission and any admissions in the previous year.

b Socio-Economic Indices for Areas (SEIFA) Index of Relative Socio-Economic Disadvantage population quintiles based on statistical local area of residence.

c Accessibility/Remoteness Index of Australia (ARIA+) based on statistical local area of residence for individuals or hospital postcode for hospitals.

Randall et al.

Randall et al. BMC Public Health 2012 12:281   doi:10.1186/1471-2458-12-281

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