Socioeconomic variation in incidence of primary and secondary major cardiovascular disease events: an Australian population-based prospective cohort study

Table 1 Characteristics of study participants at baseline

Age group	45-64		65-79		≥80		All age groups
Mean age ± SD	55 ± 5.41		71 ± 4.26		84 ± 3.54		63 ± 11.17
	Number	%	Number	%	Number	%	Number	%
All participants	163 660	100	75 940	100	27 084	100	266 684	100
Sex
Male	70 502	43	39 300	52	13 893	51	123 695	46
Female	93 158	57	36 640	48	13 191	49	142 989	54
Education
No qualifications	13 690	8	12 320	17	5 225	20	31 235	12
Certificate/diploma/trade	102 243	63	50 004	67	17 231	66	169 478	65
University degree	46 083	28	11 966	16	3 465	13	61 514	23
Annual household income
< $20,000	18 853	14	23 541	42	10 027	55	52 421	25
$20,000- < $40,000	23 904	18	17 743	31	4 988	27	46 635	22
$40,000- < $70,000	35 401	26	9 567	17	2 128	12	47 096	23
≥$70,000	55 905	42	5 676	10	1 195	7	62 776	30
IRSD socioeconomic quintile
1 (most disadvantaged)	30 095	18	16 234	21	4 629	17	50 958	19
2	39 896	24	20 384	27	5 975	22	66 255	25
3	33 061	20	14 763	19	4 978	18	52 802	20
4	30 579	19	12 664	17	5 155	19	48 398	18
5 (least disadvantaged)	29 866	18	11 858	16	6 338	23	48 062	18
Region of birth
Australia/NZ	127 970	79	57 703	77	19 191	72	204 864	77
Other	34 720	21	17 343	23	7 417	28	59 480	23
Region of residence
Major cities	72 554	44	30 653	40	16 867	62	120 074	45
Inner regional	57 828	35	29 087	38	6 793	25	93 708	35
Outer regional/remote/very remote	33 126	20	16 166	21	3 415	13	52 707	20
Private health insurance
Yes (hospital/DVA)	111 826	68	45 687	60	16 305	60	173 818	65
No	51 833	32	30 247	40	10 777	40	92 857	35
Prior major CVD
Yes	19 577	12	24 953	33	13 775	51	58 305	22
No	144 083	88	50 987	67	13 309	49	208 379	78

% show characteristics within a given age group. Denominators of the percentages do not include missing cases. Number of missing cases: education = 4,457 (1.7%); annual household income = 57,756 (21.7%); IRSD socioeconomic quintile = 209 (0.1%); region of birth = 2,340 (0.9%); region of residence = 195 (0.1%); private health insurance = 9 (<0.1%)

ISSN: 1475-9276