Table 3.
Relationship of SLA attributes with standardised ratios* of LOS and cost by Aboriginality, South Australian public hospitals 2005–2006 to 2010–2011
| LOS | Aboriginal | Non-Aboriginal | ||||||
| Change coefficient | 95% CIs | p | N (SLAs) | Change coefficient | 95% CIs | p | N (SLAs) | |
| Chronic PPH | 118 | 119 | ||||||
| Constant | 2.09 | 0.00 to 5.83 | <0.001 | 0.46 | 0.38 to 0.54 | <0.001 | ||
| Area disadvantage rank (2011 IRSD)† | 0.03 | 0.00 to 0.07 | 0.005 | 0.01 | 0.01 to 0.01 | <0.001 | ||
| Area remoteness (ARIA+)‡ | 1.04 | 0.63 to 1.44 | <0.001 | 0.02 | 0.00 to 0.04 | 0.183 | ||
| Diabetes complications PPH | ||||||||
| Constant | 2.59 | 0.00 to 10.82 | 0.003 | 0.41 | 0.31 to 0.52 | <0.001 | ||
| Area disadvantage rank (2011 IRSD)† | 0.05 | 0.00 to 0.15 | 0.005 | 0.01 | 0.01 to 0.01 | <0.001 | ||
| Area remoteness (ARIA+)‡ | 1.62 | 0.73 to 2.51 | <0.001 | 0.02 | 0.00 to 0.05 | 0.225 | ||
| Other chronic PPH | ||||||||
| Constant | 1.86 | 0.00 to 5.45 | <0.001 | 0.48 | 0.39 to 0.56 | <0.001 | ||
| Area disadvantage rank (2011 IRSD)† | 0.02 | 0.00 to 0.06 | 0.004 | 0.01 | 0.01 to 0.01 | <0.001 | ||
| Area remoteness (ARIA+)‡ | 0.82 | 0.43 to 1.21 | <0.001 | 0.01 | 0.00 to 0.04 | 0.258 | ||
| Cost | ||||||||
| Chronic PPH | ||||||||
| Constant | 2.44 | 0.00 to 5.92 | <0.001 | 0.44 | 0.36 to 0.51 | <0.001 | ||
| Area disadvantage rank (2011 IRSD)† | 0.02 | 0.00 to 0.06 | 0.008 | 0.01 | 0.01 to 0.01 | <0.001 | ||
| Area remoteness (ARIA+)‡ | 1.18 | 0.80 to 1.55 | <0.001 | 0.02 | 0.00 to 0.04 | 0.078 | ||
| Diabetes complications PPH | ||||||||
| Constant | 3.95 | 0.00 to 10.88 | <0.001 | 0.40 | 0.30 to 0.50 | <0.001 | ||
| Area disadvantage rank (2011 IRSD)† | 0.03 | 0.00 to 0.12 | 0.006 | 0.01 | 0.01 to 0.01 | <0.001 | ||
| Area remoteness (ARIA+)‡ | 1.43 | 0.68 to 2.18 | <0.001 | 0.02 | 0.00 to 0.05 | 0.258 | ||
| Other chronic PPH | ||||||||
| Constant | 1.74 | 0.77 to 5.40 | <0.001 | 0.45 | 0.37 to 0.53 | <0.001 | ||
| Area disadvantage rank (2011 IRSD)† | 0.02 | 0.00 to 0.06 | 0.005 | 0.01 | 0.01 to 0.01 | <0.001 | ||
| Area remoteness (ARIA+)‡ | 1.08 | 0.69 to 1.48 | <0.001 | 0.02 | 0.00 to 0.04 | 0.090 | ||
*Square root transformed.
†Change is per one unit increase in SLA disadvantage rank.
‡Change is per one unit increase in SLA ARIA +score.
ARIA+, Accessibility/Remoteness Index of Australia; IRSD, Index of Relative Socioeconomic Disadvantage; LOS, length of stay; PPH, potentially preventable hospitalisations; SLA, Statistical Local Area.