Trends in chlamydia and gonorrhea positivity among heterosexual men and men who have sex with men attending a large urban sexual health service in Australia, 2002-2009

Table 1 Chlamydia positivity and associations in men who have sex with women (MSW) attending MSHC 2002-2009

Variable	Number tested	Number positive (%)	Crude OR (95% CI)	Adjusted OR^b(95% CI)
All MSW	17769	1310 (7.37)
Year of test ^a
			1.03 (1.01-1.06)	1.04 (1.01-1.07)
Age group
< 25	4310	433 (10.05)	1.00	1.00
25-34	7908	632 (7.99)	0.78 (0.68-0.88)	0.79 (0.68-0.91)
> 35	5549	245 (4.42)	0.41 (0.35-0.49)	0.39 (0.32-0.46)
No. female sexual partners 12 mo
0-1	4263	172 (4.03)	1.00	1.00
> 1	12698	1089 (8.58)	2.23 (1.89-2.63)	2.11 (1.75-2.5)
Condom use 12 mo
always	2583	88 (3.41)	1.00
sometimes, usually, never	13883	1167 (8.41)	2.60 (2.09-3.24)
No. female sexual partners 3 mo
0-1	9499	565 (5.95)	1.00
> 1	7470	696 (9.32)	1.62 (1.45-1.82)
Condom use 3 mo
always	3024	110 (3.64)	1.00	1.00
sometimes, usually, never	12277	1117 (9.10)	2.65 (2.17-3.24)	2.78 (2.23-3.46)
Contact with infection or symptomatic presentation
No	6546	258 (3.94)	1.00	1.00
Yes	8650	937 (10.83)	2.96 (2.57-3.41)	3.34 (2.89-3.88)

^a The odds ratio (OR) shows the association with chlamydia with each additional calendar year.
^b Adjusted for age, number of sexual partners last 12 months, condom use last 3 months and contact history or symptomatic presentation.
OR = odds ratio, MSHC Melbourne Sexual Health Centre, mo = months

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