Table 3

Estimates of the average number of annual clinic visits associated with minimum hospitalisations for demographic and disease groups, using two quadratic models, Northern Territory, 2007-2011
Group Optimal clinic visits Goodness-of-fit (χ2)
Spline model Quadratic model Spline model Quadratic model
Total 4 15 1284.3* 4381.5*
Female 5 16 1322.4* 2360.0*
Age 40+ years 9 24 2117.3* 2542.2*
PAH 2 17 1477.2* 3127.3*
Adult chronic diseases
Diabetes 23 28 2929.7# 4599.1#
IHD 27 28 3169.3# 4066.8#
COPD 22 20 2998.0# 3586.3#
Renal disease 30 29 2848.8# 7696.8#
Hypertension 20 25 2913.1# 5292.8#
Child health conditions (age < 15)
Respiratory infection 3 12 44.4* 532.1*
Rheumatic heart disease 6 20 30.6* 35.9*
Gastroenteritis 4 17 46.0* 162.9*
Malnutrition 2 11 49.8* 114.3*
Dental 5 8 28.3* 112.0*
Otitis media 5 8 91.6* 336.9*

Notes: # P < 0.01; * P > 0.95; COPD = chronic obstructive pulmonary disease; PAH = potentially avoidable hospitalisation [23]; χ2 = chi-square.

Zhao et al.

Zhao et al. BMC Health Services Research 2013 13:466   doi:10.1186/1472-6963-13-466

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