Incidence and predictors of annual chlamydia testing among 15–29 year olds attending Aboriginal primary health care services in New South Wales, Australia

Table 2 Incidence rates and predictors of chlamydia testing in 15–29 year olds, 2009-2011

Demographic factors, year and ACCHS site	Incidence rate^a (95 % CI)^b	Unadjusted hazard ratio (95 % CI)^b	p-value*	Adjusted hazard ratio (95 % CI)^b	p-value*
2009-2011	9.1 (8.1-10.3)
Year
2010	9.6 (7.8-11.8)
2011	8.9 (7.7-10.3)
Gender
Female	11.6 (10.1-13.3)	1.5 (1.1-1.9)	<0.01	1.7 (1.2-2.2)	<0.01
Male	5.8 (4.6-7.3)	1	-	1	-
Age-group (years)
15-19	9.0 (7.4-11.0)	1.3 (0.9-1.8)	0.06	1.6 (1.1-2.3)	<0.01
20-24	11.0 (9.1-13.2)	1.2 (0.9-1.6)	0.24	1.3 (0.9-1.8)	0.11
25-29	7.1 (5.6-9.1)	1		1
Aboriginal status
Aboriginal	9.7 (8.6-11.1)	1.1 (0.8-1.6)	0.50	1.2 (0.9-1.8)	0.05
Non-Aboriginal	6.3 (4.5-8.8)	1	-	1	-
ACCHS site
1	1.1 (0.5-2.2)	1.6 (0.7-3.5)	0.25	1.6 (0.7-3.6)	0.22
2	13.6 (10.4-17.8)	3.4 (1.6-7.1)	0.01	3.8 (1.8-8.0)	<0.01
3	14.0 (12.0-16.4)	2.0 (0.9-4.4)	0.07	2.2 (0.9-4.7)	0.05
4	7.6 (5.9-9.8)	1		1

^aIncidence rate per 100 person-years, ^bHazard ratio and 95 % confidence interval, *p-value – significance at p < 0.05