Skip to main content

Advertisement

Table 4 Multivariable models using negative binomial regression for rates of GP visits (truncated at max 104, allowing maximum of 1 GP visit per week) and specialist consults over 2 years prior to first IHD admission (n = 27,230)

From: Patterns of Medicare-funded primary health and specialist consultations in Aboriginal and non-Aboriginal Australians in the two years before hospitalisation for ischaemic heart disease

Multivariable model for GP consults Multivariable model for specialist consults
GP visits (truncated) IRR p-value 95% CI   IRR p-value 95% CI  
Age at admission 1.02 < 0.001 1.02 1.02 1.03 < 0.001 1.02 1.03
Female gender 1.32 < 0.001 1.30 1.35 1.32 < 0.001 1.28 1.37
Year of admission 0.96 < 0.001 0.95 0.96 0.95 < 0.001 0.94 0.96
Aboriginal status (1) 1.07 0.004 1.02 1.12 0.44 < 0.001 0.40 0.48
With private medical insurance 0.90 < 0.001 0.88 0.92 1.81 < 0.001 1.75 1.86
ARIA classification
 Highly accessible 1.00     1.00    
 Accessible 0.93 < 0.001 0.91 0.94 0.92 < 0.001 0.89 0.96
 Moderately accessible 0.82 < 0.001 0.79 0.84 0.80 < 0.001 0.76 0.84
 Remote 0.86 < 0.001 0.80 0.92 0.82 0.002 0.72 0.93
 Very remote 0.66 < 0.001 0.63 0.69 0.44 < 0.001 0.40 0.48
Comorbidities
 Heart failure 1.04 0.031 1.00 1.09 1.02 0.629 0.95 1.09
 Chronic kidney disease 1.19 < 0.001 1.13 1.25 1.53 < 0.001 1.40 1.66
 Hypertension 1.17 < 0.001 1.15 1.19 1.07 < 0.001 1.03 1.10
 Rheumatic/valvular heart disease 1.14 < 0.001 1.11 1.17 1.25 < 0.001 1.20 1.31
 Diabetes 1.33 < 0.001 1.30 1.36 1.47 < 0.001 1.41 1.53
 COPD 1.42 < 0.001 1.37 1.48 1.42 < 0.001 1.33 1.52
 Cancer 1.2 < 0.001 1.17 1.23 1.71 < 0.001 1.63 1.78
 Cerebrovascular disease 1.29 0.002 1.10 1.51 1.23 0.145 0.93 1.63
 Stroke 0.98 0.835 0.83 1.16 1.04 0.817 0.77 1.39
 Coronary heart disease 0.77 < 0.001 0.70 0.83 0.71 < 0.001 0.61 0.82
 Charlson index 0.89 < 0.001 0.88 0.9 0.88 < 0.001 0.86 0.89
  1. IRR = incidence rate ratio; 95% CI = 95% confidence interval
  2. Notes: For age group under 55 years and separately, in patients 55 years and older, there was no significant difference between Aboriginal and non-Aboriginal patients for GP visits (truncated at 104). When restricted to only metropolitan patients, Aboriginal patients had an adjusted IRR of only 0.36 (95% CI 0.31–0.42, p < 0.001) for specialist visits (as a count variable). Having private medical insurance was negatively associated with GP visits but positively with specialist visits, the IRR is 1.84 (95% CI 1.77–1.90) compared with those without private medical insurance