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 3 Gonorrhea positivity and associations in men who have sex with men (MSM) attending MSHC 2002-2009

	Anal Gonorrhea				Pharyngeal Gonorrhea
	Number tested	Number positive (%)	Crude OR (95% CI)	Adjusted OR^b(95% CI)	Number tested	Number positive (%)	Crude OR (95% CI)	Adjusted OR^b(95% CI)
All MSM	5833	178 (3.05)			6980	128 (1.83)
Year of test ^a
			0.93 (0.87-1.00)	0.95 (0.88-1.04)			0.99 (0.91-1.07)	1.01 (0.93-1.11)
Age group
< 25	1496	62 (4.14)	2.28 (1.44-3.60)	2.46 (1.54-3.94)	1735	47 (2.71)	1.00	2.68 (1.63-4.41)
25-34	2314	68 (2.94)	1.56 (0.99-2.45)	1.54 (0.96-2.46)	2677	50 (1.87)	0.68 (0.46-1.02)	1.70 (1.05-2.78)
> 35	2022	48 (2.37)	1.00	1.00	2567	31 (1.22)	0.44 (0.28-0.69)	1.00
No. male sexual partners 12 mo
0-1	784	11 (1.40)	1.00	1.00	965	10 (1.04)	1.00
> 1	4384	144 (3.28)	2.39 (1.29-4.43)	1.83 (0.91-3.64)	5314	107 (2.01)	1.96 (1.02-3.77)
Condom use 12 mo
always	2093	48 (2.29)	1.00
sometimes, usually, never	2761	112 (4.06)	1.80 (1.28-2.54)
No. male sexual partners 3 mo
0-1	1861	36 (1.93)	1.00		2261	29 (1.28)	1.00	1.00
> 1	3465	126 (3.64)	1.91 (1.32-2.78)		4187	94 (2.25)	1.77 (1.16-2.69)	1.63 (1.05-2.54)
Condom use 3 mo
always	2107	54 (2.56)	1.00	1.00
sometimes, usually, never	2414	101 (4.18)	1.66 (1.19-2.32)	1.64 (1.13-2.39)
Contact with infection or symptomatic presentation
No	2425	41 (1.69)	1.00	1.00	2876	29 (1.01)	1.00	1.00
Yes	1960	113 (5.77)	3.56 (2.48-5.11)	3.63 (2.45-5.38)	2468	85 (3.44)	3.50 (2.29-5.36)	3.69 (2.40-5.68)

^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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