Table 4 Testing for a trend over time in unplanned readmission or death: Unadjusted and adjusted GLM regression models of unplanned readmission or death by Aboriginal status including an interaction term for year and Aboriginal status (2005/6 to 2013/14)
Unplanned readmission or death with interaction term Relative risks (RR) (95% CI) | ||||||
|---|---|---|---|---|---|---|
Unadjusted RR with propensity score (PS) weight | Unadjusted RR without PS weight | Adjusteda RR with PS weight | Adjusteda RR without PS weight | Adjusteda RR with PS weight and restricted to < 75 years | P-value | |
Aboriginal status | ||||||
Non-Aboriginal | ref | ref | ref | Ref | red | |
Aboriginal | 1.15 (1.11, 1.19) | 1.16 (1.12, 1.20) | 1.28 (1.23, 1.32) | 1.28 (1.23, 1.33) | 1.33 (1.27, 1.39) | < 0.0001 |
Year | 1.00 (0.99, 1.01) | 1.00 (0.99, 1.01) | 1.00 (0.99, 1.01) | 0.99 (0.99, 1.01) | 1.01 (0.99, 1.02) | 0.140 |
Interaction term | ||||||
Year and Aboriginal status | 1.00 (0.99, 1.02) | 1.01 (0.99, 1.02) | 1.01 (0.99, 1.02) | 1.01 (1.00, 1.02) | 0.99 (0.97, 1.00) | 0.176 |
Gender | – | – | – | |||
Male | – | – | ref | ref | ref | |
Female | – | – | 0.89 (0.86, 0.92) | 0.89 (0.86, 0.92) | 0.88 (0.84, 0.91) | < 0.0001 |
Age | – | – | 1.01 (1.00, 1.01) | 1.01 (1.01, 1.01) | 1.00 (1.00, 1.01) | < 0.0001 |
Marital status | – | – | ||||
Married | – | – | ref | ref | ref | |
Single | – | – | 1.19 (1.15, 1.24) | 1.20 (1.15, 1.25) | 1.21 (1.16, 1.26) | < 0.0001 |
Widowed | – | – | 1.18 (1.12, 1.23) | 1.18 (1.13, 1.24) | 1.24 (1.16, 1.32) | < 0.0001 |
Divorced/separated | – | – | 1.15 (1.10, 1.21) | 1.15 (1.10, 1.21) | 1.20 (1.13, 1.26) | < 0.0001 |
Not known | – | – | 0.93 (0.81, 1.07) | 0.94 (0.82, 1.07) | 0.97 (0.83, 1.13) | 0.714 |
IRSD | ||||||
1st quintile - most disadvantaged | – | – | ref | ref | ref | |
2nd quintile | – | – | 0.95 (0.91, 0.99) | 0.95 (0.91, 0.99) | 0.95 (0.90, 1.00) | 0.061 |
3rd quintile | – | – | 0.94 (0.90, 0.99) | 0.94 (0.90, 0.99) | 0.94 (0.90, 0.99) | < 0.05 |
4th quintile | – | – | 0.92 (0.87, 0.97) | 0.93 (0.87, 0.98) | 0.94 (0.87, 0.98) | 0.051 |
5th quintile – least disadvantaged | – | – | 0.88 (0.82, 0.94) | 0.88 (0.82, 0.94) | 0.80 (0.74, 0.87) | < 0.0001 |
ARIA | ||||||
Highly Accessible | – | – | ref | ref | ref | |
Accessible | – | – | 0.93 (0.89, 0.97) | 0.93 (0.89, 0.97) | 0.94 (0.90, 0.98) | > 0.01 |
Moderately Accessible | – | – | 0.88 (0.83, 0.93) | 0.88 (0.83, 0.93) | 0.86 (0.81, 0.92) | < 0.0001 |
Remote / Very Remote | – | – | 0.67 (0.61, 0.73) | 0.67 (0.61, 0.73) | 0.65 (0.59, 0.72) | < 0.0001 |
Charlson Index score | ||||||
0 | – | – | ref | ref | ref | |
1 | – | – | 1.43 (1.38, 1.49) | 1.43 (1.38, 1.49) | 1.46 (1.40, 1.52) | < 0.0001 |
2+ | – | – | 1.63 (1.57, 1.70) | 1.63 (1.57, 1.69) | 1.69 (1.62, 1.77) | < 0.0001 |