All | Less than 55 years | 55 years and over | |||||||
---|---|---|---|---|---|---|---|---|---|
Aboriginal | Non-Aboriginal | p-value | Aboriginal | Non-Aboriginal | p-value | Aboriginal | Non-Aboriginal | p-value | |
Number of patients (%) | 1269 (4.7) | 25,961 (95.3) | 832 (65.6) | 6706 (25.8) | < 0.001 | 437 (34.4) | 19,255 (74.2) | < 0.001 | |
First-ever, n (%) | 1041 (82.0) | 22,416 (86.3) | < 0.001 | 700 (84.1) | 6074 (90.6) | < 0.001 | 341 (78.0) | 16,342 (84.9) | < 0.001 |
Sub-types of IHD, n(%) | |||||||||
▪ Unstable angina | 346 (27.3) | 6186 (23.8) | < 0.001 | 224 (26.9) | 1652 (24.6) | < 0.001 | 122 (27.9) | 4534 (23.6) | < 0.001 |
▪ Acute myocardial infarction | 456 (35.9) | 7377 (28.4) | 312 (37.5) | 2259 (33.7) | 144 (33.0) | 5118 (26.6) | |||
▪ Other IHD | 466 (36.7) | 12,391 (47.7) | 296 (35.6) | 2793 (41.7) | 170 (38.9) | 9598 (49.9) | |||
▪ Subsequent MI | 1 (0.1) | 7 (0.03) | 0 | < 5 (0.0) | < 5 (0.2) | 5 (0.0) | |||
Total relevant MBS records (pre-2 years) | 47,047 (3.5) | 1,301,191 (96.5) | < 0.001 | 27,805 (59.1) | 228,849 (17.6) | < 0.001 | 19,242 (40.9) | 1,072,342 (82.4) | < 0.001 |
1st year before index admission, n(%) | 26,365 (56.0) | 733,063 (56.3) | 0.200 | 15,735 (56.6) | 129,341 (56.5) | 0.818 | 10,630 (55.2) | 603,722 (56.3) | 0.012 |
2nd year before index, n(%) | 20,682 (44.0) | 568,128 (43.7) | 12,070 (43.4) | 99,508 (43.5) | 8612 (44.8) | 468,620 (43.7) | |||
Mean age ± SD | 50.2 ± 10.1 | 60.5 ± 9.3 | < 0.001 | 44.4 ± 6.6 | 47.9 ± 5.4 | < 0.001 | 61.4 ± 5.0 | 64.9 ± 5.7 | < 0.001 |
Female sex, n(%) | 574 (45.2) | 7363 (28.4) | < 0.001 | 355 (42.7) | 1621 (24.2) | < 0.001 | 219 (50.1) | 5742 (29.8) | < 0.001 |
Urban/rural, n(%) | |||||||||
Rural | 817 (64.4) | 5260 (20.3) | < 0.001 | 541 (65.0) | 1485 (22.1) | < 0.001 | 276 (63.2) | 3775 (19.6) | < 0.001 |
Urban | 452 (35.6) | 20,701 (79.7) | 291 (35.0) | 5221 (77.9) | 161 (36.8) | 15,480 (80.4) | |||
ARIA classification, n(%) | |||||||||
Highly accessible | 282 (22.2) | 12,641 (48.7) | < 0.001 | 177 (21.4) | 3179 (47.5) | < 0.001 | 103 (23.9) | 9454 (49.2) | < 0.001 |
Accessible | 236 (18.6) | 9362 (36.1) | 155 (18.7) | 2390 (35.7) | 81 (18.8) | 6971 (36.3) | |||
Moderately accessible | 202 (15.9) | 2723 (10.5) | 135 (16.3) | 685 (10.2) | 67 (15.6) | 2034 (10.6) | |||
Remote | 42 (3.3) | 416 (1.6) | 25 (3.0) | 111 (1.7) | 17 (3.9) | 295 (1.5) | |||
Very Remote | 505 (39.8) | 812 (3.1) | 337 (40.7) | 327 (4.9) | 163 (37.8) | 469 (2.4) | |||
Indeterminate | < 5 (0.2) | 7 (0.03) | 0 | < 5 (0.0) | 0 | 5 (0.0) | |||
With private medical insurance, n (%) | 34 (2.7) | 11,603 (44.7) | < 0.001 | 21 (2.5) | 2752 (41.0) | < 0.001 | 13 (3.0) | 8851 (46.0) | < 0.001 |
Charlson comorbidity index (≥ 1), n % | 446 (35.2) | 6817 (26.3) | < 0.001 | 285 (34.3) | 1879 (28.0) | < 0.001 | 161(36.8) | 4938 (25.6) | < 0.001 |
Other comorbiditiesa, n (%) | |||||||||
➢ Hypertension | 680 (53.6) | 11,502 (44.3) | < 0.001 | 402 (48.3) | 2317 (34.6) | < 0.001 | 278 (63.6) | 9185 (47.7) | < 0.001 |
➢ Heart failure | 130 (10.2) | 1390 (5.4) | < 0.001 | 64 (7.7) | 167 (2.5) | < 0.001 | 66 (15.1) | 1223 (6.4) | < 0.001 |
➢ Chronic kidney disease | 167 (13.2) | 789 (3.0) | < 0.001 | 90 (10.8) | 156 (2.3) | < 0.001 | 77 (17.6) | 633 (3.3) | < 0.001 |
➢ Valvular heart disease | 161 (12.7) | 3367 (13.0) | 0.770 | 86 (10.3) | 459 (6.8) | < 0.001 | 75 (17.2) | 2908 (15.1) | 0.235 |
➢ Diabetes | 665 (52.4) | 5217 (20.1) | < 0.001 | 403 (48.4) | 1010 (15.1) | < 0.001 | 262 (60.0) | 4207 (21.9) | < 0.001 |
➢ COPD | 169 (13.3) | 1266 (4.9) | < 0.001 | 83 (10.0) | 173 (2.6) | < 0.001 | 86 (19.7) | 1093 (5.7) | < 0.001 |
➢ Cancer | 59 (4.7) | 3607 (13.9) | < 0.001 | 23 (2.8) | 515 (7.7) | < 0.001 | 36 (8.2) | 3092 (16.1) | < 0.001 |
➢ Cerebravascular disease | 53 (4.2) | 808 (3.1) | 0.034 | 29 (3.5) | 71 (1.1) | < 0.001 | 24 (5.5) | 737 (3.8) | 0.074 |
Mortality, n (%) | |||||||||
30-day mortality post-index | 24 (1.9) | 332 (1.3) | 0.061 | 12 (1.4) | 45 (0.7) | < 0.001 | 12 (2.8) | 287 (1.5) | 0.034 |
1-year mortality post-index | 70 (5.5) | 788 (3.0) | < 0.001 | 29 (3.5) | 90 (1.3) | < 0.001 | 41 (9.4) | 698 (3.6) | < 0.001 |