Table 2.

Prevalence of subfertility/infertility encounters per 1,000 females, stratified by clinical and demographic characteristics, and by Aboriginal and Torres Strait Islander status

Characteristics	Encounters with Aboriginal and Torres Strait Islander females		Encounters with Non-Indigenous females		Rate Ratio1
	Per 1,000	95% CI	Per 1,000	95% CI
All patients	12.37	11.18, 13.65	16.62	16.39, 16.85	0.74
Age group (years) at first subfertility/infertility encounter
18–24	11.82	9.67, 14.31	5.48	5.19, 5.79	2.16
25–29	20.47	16.90, 24.57	18.53	17.95, 19.12	1.10
30–34	19.06	15.28, 23.48	30.90	30.14, 31.67	0.62
35–39	12.82	9.48, 16.95	30.41	29.60, 31.24	0.42
40–44	8.30	5.56, 11.93	17.58	16.93, 18.26	0.47
45–49	1.63	0.75, 3.10	3.54	3.31, 3.78	0.46
Rurality 2
Major city	11.70	9.87, 13.77	17.43	17.15, 17.72	0.67
Inner/Outer Regional	13.26	11.63, 15.05	14.96	14.56, 15.36	0.89
Remote/Very Remote	7.69	3.69, 14.14	14.46	12.89, 16.18	0.53
Missing	4.57	0.16, 25.44	13.09	10.74, 15.80	0.35
Relative socio-economic advantage and disadvantage (SEIFA quintiles)
First quintile (most disadvantaged)	12.52	10.28, 15.10	15.24	14.62, 15.86	0.82
Second quintile	14.38	12.03, 17.07	16.62	16.06, 17.20	0.87
Third quintile	11.46	9.17, 14.15	16.74	16.25, 17.24	0.68
Forth quintile	11.16	8.20, 14.84	16.78	16.30, 17.27	0.67
Fifth quintile (most advantaged)	9.49	5.80, 14.66	17.24	16.79, 17.71	0.55
Commonwealth concession card
Yes	11.58	10.04, 13.29	10.91	10.50, 11.34	1.06
No	15.24	12.94, 17.83	19.36	19.04, 19.68	0.79
Not recorded	8.61	6.03, 11.92	14.00	13.54, 14.48	0.62
Smoking status
Never smoked	16.34	13.46, 19.64	21.40	20.97, 21.85	0.76
Ex-smoker	19.26	15.32, 23.91	25.98	25.24, 26.74	0.74
Smoker	10.02	8.61,11.59	10.54	10.23, 10.84	0.95
Not recorded	7.02	4.22, 10.96	10.71	10.22, 11.21	0.66
Comorbid conditions
Asthma	15.64	12.79, 18.93	19.06	18.38, 19.76	0.82
Anxiety	19.54	16.51, 22.97	20.84	20.23, 21.46	0.94
Depression	15.26	12.99, 1782	18.76	18.23, 19.30	0.81
Hypertension	11.16	7.36, 16.24	16.49	15.46, 17.56	0.68
Hyperlipidaemia	12.20	5.58, 23.15	19.21	17.22, 21.37	0.63
Hypercholesterolaemia	9.75	4.87, 17.45	16.93	15.53, 18.42	0.58
Diabetes	10.73	6.46, 16.75	16.28	14.63, 18.08	0.66
Polycystic ovary syndrome	64.80	51.42, 80.48	66.31	63.82, 68.88	0.98

SEIFA, Socio-Economic indexes for areas

¹Rate ratio is the Aboriginal and Torres Strait Islander rate divided by the non-Indigenous rate for each strata

²Geographical remoteness category of patient residence. Based on ABS ASGS remoteness areas – assigned according to postcode of patient’s residence