Estimating the total prevalence and incidence of end-stage kidney disease among Aboriginal and non-Aboriginal populations in the Northern Territory of Australia, using multiple data sources

Table 2 Prevalence of end-stage kidney disease by age group, sex and Aboriginal status, Northern Territory, based on 31/12/2013

Age groups	Actual cases in datasets	Estimated undiagnosed cases ^a	Under estimation (%)	Prevalence^b (per 1000)	95% CI ^b	Prevalence^b (per 1000) without undiagnosed cases	95% CI ^b	RRT cases	RRT proportion (%)	RRT proportion with undiagnosed cases (%)
NT Aboriginal
Male
< 35	17	3	15.0	0.81	0.46–1.17	0.69	0.36–1.02	17	100.0	85.0
35–64	219	31	12.4	24.81	21.77–27.85	21.73	18.89–24.58	188	85.8	75.2
> 64	33	6	15.4	36.38	25.17–47.59	30.78	20.44–41.12	23	69.7	59.0
Aboriginal males	269	40	12.9	14.50	14.31–14.69	12.55	12.38–12.73	228	84.8	73.8
Female
< 35	22	4	15.4	1.11	0.68–1.54	0.94	0.55–1.33	19	86.4	73.1
35–64	324	48	12.9	35.26	31.74–38.78	30.71	27.42–34.01	268	82.7	72.0
> 64	67	9	11.8	55.43	43.32–67.55	48.87	37.46–60.28	44	65.7	57.9
Aboriginal females	413	61	12.9	21.05	20.84–21.27	18.40	18.20–18.60	331	80.1	69.8
Aboriginal	682	101	12.9	17.97	17.82–18.11	15.65	15.52–15.79	559	82.0	71.4
NT non-Aboriginal
Male
< 35	12	2	14.3	0.30	0.14–0.45	0.25	0.11–0.40	12	100.0	85.7
35–64	37	6	14.0	1.12	0.79–1.46	0.97	0.66–1.28	33	89.2	76.7
> 64	26	4	13.3	4.24	2.73–5.75	3.67	2.26–5.08	20	76.9	66.7
Non-Aboriginal males	75	12	13.8	1.11	1.08–1.13	0.96	0.93–0.98	65	86.7	74.7
Female
< 35	8	2	20.0	0.25	0.09–0.40	0.20	0.06–0.34	8	100.0	80.0
35–64	33	5	13.2	1.14	0.78–1.51	0.99	0.65–1.33	32	97.0	84.2
> 64	16	4	20.0	3.65	2.05–5.24	2.92	1.49–4.35	12	75.0	60.0
Non-Aboriginal females	57	11	16.2	1.02	0.99–1.05	0.85	0.82–0.87	52	91.2	76.5
Non-Aboriginal	132	23	14.8	1.07	1.05–1.09	0.91	0.89–0.92	117	88.6	75.5
Total	814	124	13.2	4.57	4.53–4.60	3.96	3.93–3.99	676	83.0	72.1

^a Capture-recapture model with 4 data sources for Aboriginal patients and 3 data sources for non-Aboriginal patients. ^b Age adjusted to 2001 Australian population