Table 4.
Logistic regression model for three or more compared with one to two avoidable admissions: for each financial year of the study period (2005/06–2013/14) by Aboriginal status and explanatory factors (n = 19,025)
| ≥3 avoidable admissions compared to 1 to 2 per financial year Odds ratios (OR) (95% CI) |
||||
|---|---|---|---|---|
| Unadjusted OR | Adjusted OR | Adjusted OR & restricted to < 75 years | P-value | |
| Aboriginal status | < 0.0001 | |||
| Non-Aboriginal | ref. | ref. | ref. | |
| Aboriginal | 1.79 (1.58, 2.03) | 1.97 (1.71, 2.27) | 1.90 (1.60, 2.26) | |
| Financial year | 0.6760a | |||
| 2005–06 | ref. | ref. | ref. | |
| 2006–07 | 0.93 (0.75, 1.16) | 0.94 (0.75, 1.17) | 0.91 (0.71, 1.16) | |
| 2007–08 | 0.89 (0.71, 1.10) | 0.88 (0.71, 1.10) | 0.84 (0.66, 1.07) | |
| 2008–09 | 0.86 (0.69, 1.08) | 0.85 (0.68, 1.06) | 0.78 (0.61, 0.99) | |
| 2009–10 | 0.96 (0.77, 1.18) | 0.93 (0.75, 1.16) | 0.88 (0.69, 1.11) | |
| 2010–11 | 0.94 (0.76, 1.17) | 0.91 (0.73, 1.13) | 0.92 (0.72, 1.17) | |
| 2011–12 | 0.97 (0.79, 1.20) | 0.93 (0.76, 1.15) | 0.93 (0.74, 1.17) | |
| 2012–13 | 0.90 (0.73, 1.11) | 0.86 (0.69, 1.07) | 0.85 (0.67, 1.08) | |
| 2013–14 | 0.99 (0.81, 1.23) | 0.96 (0.78, 1.18) | 0.94 (0.74, 1.18) | |
| Sex | ||||
| Male | – | ref. | ref. | |
| Female | – | 0.96 (0.86, 1.06) | 1.01 (0.90, 1.13) | 0.864 |
| Age | – | 1.01 (1.01, 1.02) | 1.02 (1.01, 1.02) | < 0.0001 |
| Marital status | ||||
| Married | – | ref. | ref. | |
| Single | – | 1.27 (1.11, 1.45) | 1.37 (1.19, 1.59) | < 0.0001 |
| Widowed | – | 1.12 (0.96, 1.30) | 1.31 (1.09, 1.58) | 0.004 |
| Divorced/separated | – | 1.33 (1.14, 1.54) | 1.34 (1.14, 1.57) | < 0.0001 |
| Not known | – | 0.92 (0.59, 1.45) | 0.90 (0.54, 1.50) | 0.694 |
| Index of relative socio-economic disadvantage (IRSD) | ||||
| 1st quintile – most disadvantaged | – | ref. | ref. | |
| 2nd quintile | – | 0.86 (0.75, 0.99) | 0.89 (0.76, 1.04) | 0.146 |
| 3rd quintile | – | 1.01 (0.86, 1.18) | 1.00 (0.84, 1.20) | 0.970 |
| 4th quintile | – | 0.91 (0.76, 1.10) | 1.00 (0.82, 1.23) | 0.979 |
| 5th quintile – least disadvantaged | – | 0.80 (0.63, 1.03) | 0.69 (0.50, 0.95) | < 0.05 |
| Accessibility/remoteness index of Australia (ARIA) | ||||
| Highly Accessible | – | ref. | ref. | |
| Accessible | – | 0.89 (0.78, 1.01) | 0.85 (0.73, 0.98) | < 0.05 |
| Moderately Accessible | – | 0.98 (0.82, 1.16) | 0.89 (0.74, 1.08) | 0.245 |
| Remote / Very Remote | – | 1.11 (0.90, 1.38) | 1.07 (0.85, 1.35) | 0.549 |
a Post estimation Wald test for financial year term