Table 1

Demographic and matching variables for the intellectual disability cohort and the two comparison cohorts

	Population comparison cohort (n=62 917)		Intellectual disability cohort (n=591)		P value
	N	%	N	%	P value
Age at death (years)
20–29	968	1.5	55	9.3	<0.001
30–39	1385	2.2	55	9.3
40–49	2550	4.1	88	14.9
50–59	4752	7.6	146	24.7
60–69	7887	12.5	115	19.5
70–79	12 699	20.2	79	13.4
80–89	21 120	33.6	45	7.6
90+	11 556	18.4	8	1.4
Sex
Male	33 089	52.6	332	56.2	0.082
Female	29 828	47.4	259	43.8	0.082
Index of Relative Social Disadvantage
Most disadvantaged	16 604	26.4	208	35.2	<0.001
More disadvantaged	13 344	21.2	140	23.7
Average	10 926	17.4	98	16.6
Less disadvantaged	9663	15.4	64	10.8
Least disadvantaged	8404	13.4	49	8.3
Unknown	3976	6.3	32	5.4
Partner status
Not partnered	30 958	49.2	520	88.0	<0.001
Partnered	31 959	50.8	71	12.0	<0.001
Accessibility index
Major cities	45 904	73.0	445	75.3	0.245
Inner regional	5316	8.4	39	6.6
Outer regional	5200	8.3	45	7.6
Remote	1744	2.8	23	3.9
Very remote	828	1.3	8	1.4
Unknown	3925	6.2	31	5.2
Australian born
No	26 535	42.2	82	13.9	<0.001
Yes	36 382	57.8	509	86.1	<0.001