Table 1

Patient and hospital characteristics at index aortic valve replacement (AVR) procedure

Characteristic18–64 years65+ yearsTotal
BVMVBVMVBVMV
N (% of N)N (% of N)N (% of N)N (% of N)N (% of N)N (% of N)
Number of patients (N)146819968032188195003877
Patient characteristics
Age, median (Q1-Q3)59 (53–63)55 (47–61)77 (73–82)74 (69–80)76 (69–81)65 (55–74)
Sex
 Female404 (27.5)606 (30.4)2946 (36.7)751 (39.9)3350 (35.3)1357 (35.0)
 Male1064 (72.5)1390 (69.6)5086 (63.3)1130 (60.1)6150 (64.7)2520 (65.0)
Charlson Score*
 0791 (53.9)1119 (56.1)3389 (42.2)750 (39.9)4180 (44.0)1869 (48.2)
 1–2484 (33.0)682 (34.2)3028 (37.7)716 (38.1)3512 (37.0)1398 (36.1)
 3+193 (13.1)195 (9.8)1615 (20.1)415 (22.1)1808 (19.0)610 (15.7)
Remoteness
 Major city965 (65.7)1344 (67.3)5446 (67.8)1209 (64.3)6411 (67.5)2553 (65.8)
 Inner regional331 (22.5)341 (17.1)1758 (21.9)449 (23.9)2089 (22.0)790 (20.4)
 Outer regional‡96 (6.5)133 (6.7)590 (7.4)150 (8.0)686 (7.2)283 (7.3)
IRSD (quintile) §
 1 (most disadvantaged)323 (22.0)431 (21.6)1691 (21.1)447 (23.8)2014 (21.2)878 (22.7)
 2169 (11.5)217 (10.9)985 (12.3)255 (13.6)1154 (12.1)472 (12.2)
 3152 (10.4)221 (11.1)951 (11.8)212 (11.3)1103 (11.6)433 (11.2)
 4299 (20.4)404 (20.2)1663 (20.7)344 (18.3)1962 (20.7)748 (19.3)
 5 (least disadvantaged)445 (30.3)538 (27.0)2475 (30.8)544 (28.9)2920 (30.7)1082 (27.9)
Hospital and episode characteristics
Concomitant procedures
 Other valve replacement83 (5.7)341 (17.1)268 (3.3)190 (10.1)351 (3.7)531 (13.7)
 CABG¶397 (27.0)419 (21.0)3899 (48.5)825 (43.9)4296 (45.2)1244 (32.1)
Admission status
 Elective1122 (76.4)1498 (75.1)6036 (75.1)1419 (75.4)7158 (75.3)2917 (75.2)
 Emergency328 (22.3)462 (23.1)1852 (23.1)425 (22.6)2180 (22.9)887 (22.9)
 Not assigned18 (1.2)36 (1.8)144 (1.8)37 (2.0)162 (1.7)73 (1.9)
Payment status**
 Private703 (47.9)772 (38.7)3606 (44.9)709 (37.7)4309 (45.4)1481 (38.2)
 Public664 (45.2)1034 (51.8)3431 (42.7)949 (50.5)4095 (43.1)1983 (51.1)
 Other100 (6.8)187 (9.4)993 (12.4)219 (11.6)1093 (11.5)406 (10.5)
Hospital AVR volume††
 High (≥90)529 (36.0)755 (37.8)3451 (43.0)937 (49.8)3980 (41.9)1692 (43.6)
 Low (<90)939 (64.0)1240 (62.1)4581 (57.0)944 (50.2)5520 (58.1)2184 (56.3)
Person-years of follow-up
 Total6765.611 795.732 993.09244.239 758.621 039.9
 Median (Q1–Q3)4.1 (1.7–7.0)5.9 (2.9–9.0)3.6 (1.4–6.3)4.4 (2.0–7.7)3.6 (1.5–6.4)5.1 (2.3–8.4)
  • Note: missing data where % values do not add to 100%.

  • *Charlson Comorbidity Index calculated with a 1-year lookback, including index AVR admission and any admissions in the year prior

  • †Accessibility/Remoteness Index of Australia

  • ‡Includes outer regional, remote and very remote

  • §IRSD: ABS Socio-Economic Index for Areas Index of Relative Social Disadvantage (SEIFA IRSD)

  • ¶CABG: coronary artery bypass graft

  • **Other payment status on separation includes compensation (workers, NSW motor vehicle accident and other), Department of Veterans Affairs and Medicare ineligible

  • ††Median annual number of AVR procedures performed classified as high (≥90 per year) and low (<90 per year)

  • ABS, Australian Bureau of Statistics; BV, bioprosthetic valve; MV, mechanical valve.