Table II.

Comparison between sexually active MSM who had donated blood (donors, n=109) and those who had not (non-donors, n=131) using univariate and multivariate analyses.

	Donor (n=109)		Non-donor (n=131)		P for χ2	Odds ratio	95% CI	Adjusted OR	95% CI
Demographic
Age >20 years	87	79.8%	94	71.8%	0.148	1.56	(0.82–2.97)	1.218	(0.516–2.872)
In employment	67	61.5%	63	48.1%	0.03*	1.80**	(1.02–3.20)	1.786	(0.845–3.774)
Normally in Hong Kong	96	88.1%	111	84.7%	0.45	1.33	(0.59–3.01)	1.588	(0.676–3.729)
Attained post-secondary education	95	87.2%	102	77.9%	0.06	1.93	(0.91–4.11)	2.373**	(1.070–5.266)
Sexual behaviour
Sexual debut at age ≤ 16	43	39.4%	42	32.1%	0.233	1.38	(0.78–2.43)	1.853	(0.950–3.615)
Anal sex in the preceding year	91	83.5%	89	67.9%	0.006*	2.39**	(1.23–4.68)	2.273**	(1.013–5.104)
Consistent condom use# for anal sex	45	49.5%	39	43.8%	0.449	1.25	(0.67–2.35)
Oral sex in the preceding year	100	91.7%	116	88.5%	0.411	1.44	(0.56–3.74)	0.654	(0.224–1.908)
Consistent condom use# for oral sex	4	4.0%	5	4.3%	0.909	0.93	(0.18–4.43)
>5 sex partners in preceding year	30	27.5%	26	19.8%	0.162	1.53	(0.81–2.92)	1.106	(0.532–2.300)
Has ever paid for sex	13	11.9%	11	8.4%	0.36	1.48	(0.59–3.73)	1.088	(0.394–3.003)
Sex with females	5	4.6%	4	3.1%	0.533	1.53	(0.32–7.88)	1.179	(0.236–5.901)
Health- seeking behaviours
Screening for STI or HIV in the past	63	57.8%	67	51.1%	0.303	1.31	(0.76–2.26)	0.973	(0.497–1.903)
Attended clinic for suspected STI	35	32.1%	33	25.2%	0.236	1.40	(0.77–2.56)	0.997	(0.471–2.111)

^#consistent condom use refers to the use of condom for every sexual contact in the preceding 1 year.

^*Significant for chi-square test;

^**Significant for odds ratio.