Table 4.
Multivariate inferential analysis of ARF and RHD cases only found in the hospital data.
| Variable | Total (n = 5565) | Indigenous (n = 4284) | Non-Indigenous (n = 1281) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | (CI) | AOR | (CI) | p Value | OR | (CI) | AOR | (CI) | p Value | OR | (CI) | AOR | (CI) | p Value | |
| Indigenous status | |||||||||||||||
| Non-Indigenous | 7.3 | (6.2–8.5) | 3.1 | (2.4–3.9) | <0.001 | ||||||||||
| Most Recent Age (years) | |||||||||||||||
| 15–24 | 1.1 | (0.85–1.4) | 1.2 | (0.89–1.5) | 0.267 | 1.1 | (0.84–1.4) | 1.2 | (0.86–1.5) | 0.347 | 1.0 | (0.53–1.9) | 1.2 | (0.55–2.5) | 0.691 |
| 25–34 | 2.7 | (2.1–3.3) | 3.8 | (2.9–5.1) | <0.001 | 2.7 | (2.1–3.4) | 3.5 | (2.5–4.8) | <0.001 | 3.6 | (1.8–7.0) | 7.6 | (3.3–18) | <0.001 |
| 35–44 | 6.8 | (5.4–8.5) | 10 | (7.4–14) | <0.001 | 6.9 | (5.4–8.9) | 9.7 | (7.0–14) | <0.001 | 4.8 | (2.6–9.2) | 9.1 | (4.0–22) | <0.001 |
| 45–54 | 11 | (8.4–13) | 14 | (11–20) | <0.001 | 9.4 | (7.3–12) | 14 | (10–20) | <0.001 | 6.8 | (3.7–12) | 16 | (7.0–38) | <0.001 |
| 55–75 | 21 | (16–26) | 23 | (17–32) | <0.001 | 14 | (11–19) | 22 | (15–32) | <0.001 | 12 | (6.7–21) | 31 | (14–72) | <0.001 |
| Sex | |||||||||||||||
| Male | 0.95 | (0.85–1.1) | 1.1 | (0.97–1.3) | 0.125 | 0.90 | (0.79–1.0) | 1.1 | (0.93–1.3) | 0.300 | 1.0 | (0.75–1.4) | 1.2 | (0.86–1.8) | 0.256 |
| Disease Status | |||||||||||||||
| Severe RHD | 1.9 | (1.7–2.2) | 0.18 | (0.14–0.23) | <0.001 | 1.6 | (1.4–1.9) | 0.20 | (0.15–0.26) | <0.001 | 1.1 | (0.68–1.7) | 0.08 | (0.04–0.17) | <0.001 |
| Mild/Moderate RHD | 1.3 | (1.1–1.5) | 0.45 | (0.37–0.56) | <0.001 | 1.5 | (1.2–1.7) | 0.49 | (0.39–0.61) | <0.001 | 1.1 | (0.64–1.8) | 0.22 | (0.11–0.44) | <0.001 |
| Vital Status | |||||||||||||||
| Dead | 2.4 | (2.0–2.8) | 1.8 | (1.5–2.3) | <0.001 | 3.1 | (2.6–3.7) | 1.8 | (1.5–2.3) | <0.001 | 1.7 | (0.97–3.2) | 1.2 | (0.62–2.4) | 0.619 |
| State of Residence | |||||||||||||||
| SA | 5.7 | (4.1–8.1) | 2.1 | (1.3–3.3) | 0.002 | 2.1 | (1.3–3.3) | 1.6 | (0.92–2.8) | 0.097 | 6.6 | (3.0–16) | 8.9 | (3.4–25) | <0.001 |
| QLD | 1.8 | (1.6–2.0) | 0.87 | (0.7–1.0) | 0.131 | 0.85 | (0.73–0.99) | 0.77 | (0.62–0.96) | 0.018 | 1.6 | (1.0–2.6) | 2.6 | (1.4–5.0) | 0.004 |
| WA | 1.7 | (1.4–2.0) | 1.1 | (0.87–1.4) | 0.421 | 0.83 | (0.68–1.0) | 0.81 | (0.62–1.1) | 0.110 | 21 | (8.1–73) | 30 | (9.7–118) | <0.001 |
| Last Diagnosis Since Register Establishment (years) | |||||||||||||||
| 2+ | 3.8 | (3.2–4.6) | 2.3 | (1.9–3.0) | <0.001 | 3.2 | (2.5–4.0) | 2.9 | (2.2–3.9) | <0.001 | 1.8 | (1.2–2.7) | 1.2 | (0.74–1.8) | 0.529 |
| Comorbidity | |||||||||||||||
| yes | 2.7 | (2.4–3.0) | 1.3 | (1.1–1.5) | 0.008 | 2.6 | (2.3–3.0) | 1.3 | (1.1–1.5) | 0.011 | 2.0 | (1.5–2.7) | 1.6 | (0.97–2.5) | 0.061 |
| Drug/Alcohol Abuse | |||||||||||||||
| yes | 1.7 | (1.5–1.9) | 1.3 | (1.1–1.5) | 0.001 | 2.6 | (2.3–3.0) | 1.3 | (1.1–1.5) | 0.004 | 1.8 | (1.3–2.6) | 1.6 | (1.1–2.4) | 0.029 |
| Remoteness (ARIA) | |||||||||||||||
| Inner Regional | 6.5 | (5.5–7.6) | 2.1 | (1.6–2.8) | <0.001 | 2.7 | (2.1–3.6) | 2.5 | (1.7–3.7) | <0.001 | 2.1 | (1.2–3.6) | 1.1 | (0.48–2.3) | 0.863 |
| Outer Regional | 1.7 | (1.5–2.0) | 1.0 | (0.9–1.3) | 0.736 | 1.3 | (1.1–1.5) | 1.1 | (0.85–1.4) | 0.515 | 1.3 | (0.71–2.4) | 0.82 | (0.38–1.7) | 0.600 |
| Socioeconomic Status | |||||||||||||||
| Quintile III | 0.41 | (0.33–0.52) | 0.71 | (0.53–0.95) | 0.022 | 0.68 | (0.53–0.87) | 1.1 | (0.83–1.5) | 0.465 | 0.42 | (0.26–0.68) | 0.44 | (0.25–0.76) | 0.003 |
| Quintile IV | 0.51 | (0.40–0.66) | 0.75 | (0.55–1.0) | 0.061 | 0.63 | (0.5–0.79) | 1.1 | (0.80–1.5) | 0.521 | 0.52 | (0.31–0.85) | 0.45 | (0.25–0.79) | 0.006 |
| Quintile V | 0.23 | (0.19–0.28) | 0.58 | (0.44–0.75) | <0.001 | 0.52 | (0.43–0.64) | 0.86 | (0.64–1.2) | 0.344 | 0.28 | (0.18–0.43) | 0.29 | (0.17–0.49) | <0.001 |