Table 4

Risk factors for diagnosis with chlamydia and gonorrhoea co-infection among HIV-positive MSM among participants attending selected clinics of the OHTN Cohort Study, 2008–2011

		Chlamydia			Gonorrhoea
	Person years of observation*	Per cent diagnosed†	Unadjusted OR (95% CI)	Adjusted OR (95% CI)‡	Per cent diagnosed†	Unadjusted OR (95% CI)	Adjusted OR (95% CI)‡
Each additional calendar year			1.02 (0.85 to 1.21)	1.03 (0.85 to 1.24)		1.05 (0.84 to 1.31)	1.09 (0.85 to 1.40)
Initiated antiretroviral treatment
No	562	2.49	Referent	Referent	2.67	Referent	Referent
Yes	6799	1.19	0.48 (0.26 to 0.90)	1.01 (0.50 to 2.07)	0.82	0.31 (0.16 to 0.59)	0.80 (0.38 to 1.69)
Age (years)
<30	279	6.09	Referent		3.23	Referent
30–39	888	3.04	0.45 (0.24 to 0.84)		1.58	0.52 (0.14 to 1.89)
40–49	3034	1.02	0.17 (0.09 to 0.32)		1.15	0.59 (0.19 to 1.84)
50+	3160	0.63	0.12 (0.06 to 0.23)		0.41	0.20 (0.06 to 0.72)
Each additional decade			0.47 (0.37 to 0.60)	0.49 (0.38 to 0.64)		0.57 (0.45 to 0.73)	0.64 (0.50 to 0.81)
Max viral load in calendar year
Undetectable/suppressed (<200 copies/mL)	5605	1.09	Referent	Referent	0.68	Referent	Referent
Unsuppressed (200 copies/mL or greater)	1638	2.01	1.76 (1.13 to 2.74)	1.18 (0.69 to 2.03)	2.01	2.95 (1.81 to 4.83)	2.12 (1.13 to 3.93)
Clinic type
Tertiary	3767	0.74	Referent	Referent	0.64	Referent	Referent
Primary	3594	1.86	2.47 (1.51 to 4.05)	1.59 (0.84 to 3.00)	1.31	2.10 (1.21 to 3.65)	2.09 (0.90 to 4.85)

Multiple logistic regression with generalised estimating equations. Each person year was modelled as a unique observation (n=7361 person-years among 2179 men).
*The sum total of years that participants were under observation.
†The per cent per year with a reactive test among all patients in care and under observation.
‡Adjusted for all variables shown plus clinic.
MSM, men who have sex with men.