Table 2

Unadjusted and adjusted odds ratios of characteristics of non-public clinic attendees compared with public clinic attendees in Baltimore, Maryland from September 2002 through August 2003

Variable	Unadjusted OR	p Value	Adjusted OR	95% CI	p Value
*Marijuana, alcohol, sniffed or snorted cocaine, ecstasy, LSD, and other street and club drugs.
Age
<30 years			Reference
⩾30 years	1.16	0.468	3.98	(1.2 to 12.7)	0.020
Ethnicity
Black			Reference
White	112.7	<0.001	311.9	(55.7 to 1746.6)	<0.001
Other	10.8	0.001
Reason for clinic visit
Symptoms			Reference
General screening	5.26	<0.001	11.2	(3.2 to 38.9)	<0.001
Time from last sexual encounter to clinic visit
<7 days			Reference
⩾7 days	2.63	<0.001	7.36	(2.2 to 25.0)	0.001
Risk factors
<3 partners in past month			Reference
⩾3 partners in past month	2.25	0.005	9.9	(2.2 to 44.5)	0.003
Non-injection drug use*	0.23	<0.001	0.092	(0.03 to 0.30)	<0.001
Injection drug use	0.38	0.067	0.011	(0.0003 to 0.55)	0.023
History of STD
Any previous history of STD	0.36	<0.001	0.17	(0.05 to 0.58)	0.005
Condom use
Never			Reference
Sometimes	2.91	<0.001	3.16	(0.95 to 10.5)	0.060
Always	0.87	0.756	0.078	(0.006 to 0.98)	0.049
STD testing
HIV test at visit	0.76	0.202	0.32	(0.10 to 1.03)	0.057