Table 4

Factors associated with unprotected anal intercourse with unknown or discordant HIV status partners in the previous 12 months: n, row %, unadjusted and multivariate logistic regression (n=639)

	Yes, n (%)	OR	95% CI	p Value	AOR*	95% CI	p Value
Overall	352 (55.1)
Survey location
Edinburgh	131 (48.2)	1			1
Glasgow	221 (60.2)	1.63	1.19 to 2.24	0.003	1.67	1.20 to 2.33	0.003
Sexual orientation
Gay	330 (54.8)	1
Bisexual	21 (61.8)	1.33	0.66 to 2.71	0.429
Age
16–25	121 (52.2)	1		0.029	1		0.101
26–35	111 (50.5)	0.93	0.65 to 1.35		0.89	0.61 to 1.32
36–45	77 (62.1)	1.50	0.96 to 2.35		1.38	0.85 to 2.24
45+	42 (67.7)	1.93	1.07 to 3.48		1.78	0.94 to 3.37
Area of residence†
Elsewhere	81 (55.9)	1			1
Glasgow/Edinburgh	260 (54.9)	0.96	0.66 to 1.40	0.831	0.93	0.62 to 1.38	0.707
Employment
Employed	277 (54.0)	1
Other	75 (59.5)	1.25	0.84 to 1.86	0.264
Education
Secondary	51 (53.7)	1.04	0.65 to 1.66
Further/vocational	129 (55.8)	1.13	0.80 to 1.61
Degree/postgraduate	144 (52.7)	1		0.240
Frequency of gay scene use†
Once a month or less	88 (51.2)	1		0.254	1		0.151
2–3 times a month	83 (52.9)	1.07	0.69 to 1.65		1.13	0.72 to 1.79
Once or more a week	181 (58.4)	1.34	0.92 to 1.95		1.47	0.98 to 2.21
HIV treatment optimism 1‡
Agree	72 (56.3)	1
Uncertain/disagree	269 (54.8)	0.94	0.64 to 1.40	0.767
HIV treatment optimism 2‡
Agree	47 (56.6)	1
Uncertain/disagree	294 (54.9)	0.93	0.58 to 1.48	0.762
Had either an HIV or STI test in previous 12 months
No	148 (63.8)	1			1
Yes	196 (49.5)	0.56	0.40 to 0.78	<0.001	0.52	0.36 to 0.73	<0.001
HIV status (from saliva test)
HIV−	285 (54.4)	1		0.069
HIV+	19 (79.2)	3.19	1.17 to 8.66
Did not provide oral fluid specimen	48 (52.7)	0.94	0.60 to 1.46
Drunk on alcohol§
Never	75 (52.8)	1			1
Always/sometimes	277 (55.7)	1.13	0.77 to 1.64	0.538	1.10	0.73 to 1.66	0.652
Used poppers
Never	211 (51.8)	1			1
Always/sometimes	141 (60.8)	1.44	1.04 to 2.00	0.029	1.27	0.89 to 1.82	0.184
Used stimulant or recreational/illicit drugs§
Never	264 (53.1)	1			1
Always/sometimes	88 (62.0)	1.44	0.98 to 2.11	0.062	1.23	0.79 to 1.89	0.359
Used Viagra
Never	290 (52.8)	1			1
Always/sometimes	62 (68.9)	1.98	1.23 to 3.19	0.005	1.58	0.92 to 2.72	0.097

*Adjusted for survey location, age, area of residence, frequency of gay scene use, HIV/STI testing, alcohol, popper, stimulant or recreational/illicit drug and Viagra use.
†Area of residence and frequency of gay scene use – associated with always or sometimes using alcohol during UAI in the previous 12 months (see table 1).
‡HIV treatment optimism 1—‘I am less worried about HIV infection now that treatments have improved’, HIV treatment optimism 2—‘I believe that new drug therapies make people with HIV less infectious’.
§Drunk on alcohol and used stimulant or recreational/illicit drugs—All alcohol and drug use variables were included in the logistic regression models because of significant correlations found between them.