The impact of socio-economic disadvantage on rates of hospital separations for diabetes-related foot disease in Victoria, Australia

Table 3 Combined summary data for hospital separations according to International Classification of Diseases code and Local Government Areas (LGA) cluster.

	Peripheral vascular disease	Ulcer	Cellulitis	Osteomyelitis	Foot amputation	Below knee amputation	Above knee amputation
Total separations
Group D	972	546	129	162	163	223	73
Group A	1238	556	152	228	301	180	79
Per capita separations
Group D	32.2	18.1	4.3	5.4	5.4	7.4	2.4
Group A	28.2	12.7	3.4	5.2	6.9	4.1	1.8
Rate ratio (95% CI)	1.15 (1.1, 1.3)	1.4 (1.3, 1.6)	1.24 (0.1, 1.6)	1.04 (0.8, 1.3)	0.8 (0.7, 1.0)	1.8 (1.5, 2.2)	1.35 (0.1, 1.9)
Mean age (years)
Males
Group D	71.5	66.8	52.5	62.0	64.0	72.3	53.8
Group A	70.0	69.0	69.7	69.8	69.0	70.6	62.7
Mean difference (95% CI)	1.5 (0.9, 2.0)	-2.2 (-3.2, -1.2)	-17.2 (-20, -14)	-7.8 (-11, -5.4)	-7.0 (-9, -4)	1.7 (0.2, 3.2)	-8.9 (-13, -4.5)
Females
Group D	75.4	57.5	57.2	71.5	69.2	75.8	76.7
Group A	74.6	76.0	69.7	80.0	72.2	68.7	73.9
Mean difference (95% CI)	0.8 (-0.1, 1.7)	-18.5 (-20, -17)	-12.5 (-16, -9.1)	-8.5 (-12, -5.4)	-3.0 (-7, -0.9)	7.1 (2.0, 12.2)	2.8 (-1.4, 7.0)
Gender (%)
Males
Group D	68.8	65.6	58.0	45.0	77.0	74.0	51.0
Group A	60.0	54.8	69.0	53.5	61.5	71.0	64.5
Females
Group D	32.0	34.4	42.0	55.0	23.0	26.0	49.0
Group A	40.0	45.2	31.0	46.5	38.5	29.0	35.5
Odds ratio (95% CI)	1.4 (1.2, 1.7)	1.6 (1.2, 2.0)	0.62 (0.4, 1.0)	0.71 (0.5, 1.1)	2.1 (1.3, 3.2)	1.0 (0.6, 1.5)	0.57 (0.3, 1.1)

Total separations are reported as absolute frequencies and per capita data refers to number of separations per 1,000 total population with diabetes per LGA cluster. Rate ratios are unadjusted for age and sex as insufficient data was available for this type of analysis. Effect estimates for age were calculated using unpaired t-test and are reported as mean difference and percentage differences for gender were analysed using chi-square and are reported as odds ratios.

ISSN: 1757-1146