Table 4.

Behavioural and demographic determinants associated with a newly diagnosed STI in male sex workers, female sex workers and MSM

	Univariate analysis	Multivariate analysis
	OR [95 %-CI]	OR [95 %-CI]
Category
Male sex workers	ref	ref
Female sex workers	0.15 [0.11–0.22]a	0.27 [0.17–0.43]a
Men having sex with men (MSM)	0.25 [0.19–0.34]a	0.41 [0.26–0.66]a
Age
Younger than 25 years	ref	ref
25 years and older	0.65 [0.54–0.80]a	0.68 [0.54–0.85]a
Ethnicity
Europe (other)/ North America	ref	ref
Eastern Europe	2.46 [1.91–3.18]a	1.48 [0.99–2.22]
Africa/ Asia / Latin America	1.13 [0.79–1.62]	1.01 [0.69–1.48]
Having sex with women (%)	0.87 [0.70–1.07]
Number of sex partners in the past 6 months
1–3	ref	ref
4–49	1.48 [1.21–1.80]a	1.30 [1.05–1.61]a
50+	1.37 [1.04–1.80]a	1.42 [0.99–2.04]
Had sexual contact with a commercial sex worker in the past six months
Did not engage in sex contact with commercial sex worker in the past 6 months a commercial sex worker in the past six months	ref
Did have sexual contact (paid or non-paying) with	0.77 [0.43–1.39]
Hepatitis B vaccination status
Not vaccinated	ref
Vaccination series not yet complete	1.14 [0.85–1.53]
Fully vaccinated	0.98 [0.76–1.27]
Positive STI history in the past 2 years
No previous STI history in the past 2 years	ref
Positive STI history in the past 2 years	1,73 [1,44–2,08]a	1.53 [1.25–1.88]a
Known to be HIV positive
Not known to be HIV positive	ref
Known to be HIV positive	2.82 [2.14–3.73]a	2.53 [1.86–3.43]a
Sequence of test during the study period
First STI test	ref
Second STI test	0,96 [0.76 – 1.22]
Third STI test	0,65 [0,47 – 0,90]
Fourth STI test	0,90 [0,62 – 1,31]
Fifth and following STI tests	1,03 [0,75 – 1,40]

^a Variable differs statistically significantly (p < 0.05) compared to reference category