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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)

From: Frequent avoidable admissions amongst Aboriginal and non-Aboriginal people with chronic conditions in New South Wales, Australia: a historical cohort study

  ≥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
  1. a Post estimation Wald test for financial year term