Table 2 Factors associated with UAI with multiple non-steady sexual partners. Odds ratios and 95 %-confidence intervals from univariable logistic regression models

Age

  < 25

0.82 (0.77–0.88)***

0.56 (0.52–0.60)***

 25–39

0.83 (0.79–0.87)***

0.81 (0.76–0.85)***

 40+

1.00 (ref)

1.00 (ref)

Settlement Size: 500,000 inhabitants or more

1.08 (1.03–1.13)**

1.30 (1.24–1.36)***

Education°

 ISCED 1–3

1.00 (ref)

1.00 (ref)

 ISCED 4

0.79 (0.74–0.84)***

0.88 (0.82–0.94)**

 ISCED 5

0.67 (0.63–0.71)***

0.90 (0.84–0.96)*

 ISCED 6

0.55 (0.51–0.58)***

0.97 (0.91–1.04)

Employed

1.00 (0.95–1.05)

1.24 (1.17–1.31)***

Born abroad

1.09 (1.03–1.16)*

1.21 (1.13–1.29)***

Sexual Identity

 Gay/homosexual

1.00 (ref)

1.00 (ref)

 Bisexual

0.79 (0.74–0.85)***

0.79 (0.73–0.85)***

 Other

0.78 (0.71–0.85)***

0.75 (0.68–0.82)***

In Steady Relationship

0.78 (0.75–0.82)***

1.07 (1.02–1.13)*

Diagnosed HIV infection

6.72 (6.12–7.38)***

6.83 (6.14–7.61)***

Any sex with women in past 12 months

0.97 (0.90–1.03)

1.03 (0.96–1.10)

Out to everyone or almost everyone participant knows

1.34 (1.28–1.41)***

1.41 (1.34–1.48)***

Feelings of loneliness

1.17 (1.11–1.22)***

0.82 (0.78–0.86)***

Sexual happiness

1.24 (1.18–1.31)***

1.61 (1.53–1.69)***

Experience of violence due to sexual attraction to men in past 12 months

 Physical abuse

2.36 (2.09–2.65)***

1.72 (1.52–1.94)***

 Intimidated or Verbal Abuse

1.10 (1.05–1.15)**

0.94 (0.90–0.99)⁺

 None

1.00 (ref)

1.00 (ref)

Visits to gay sex venues in past 4 weeks

2.70 (2.58–2.83)***

2.80 (2.66–2.94)***

Bought sex in past 12 months

1.55 (1.44–1.66)***

1.54 (1.44–1.66)***

Sold sex in past 12 months

3.97 (3.70–4.25)***

2.47 (2.31–2.65)***

Exposed to information about HIV/STIs for MSM in past 12 months

0.85 (0.80–0.91)***

1.13 (1.06–1.20)**

Knew that effective treatment of HIV infection reduces the risk of HIV being transmitted

1.34 (1.28–1.40)***

1.49 (1.42–1.56)***

Use of nitrite inhalants in past 4 weeks

2.71 (2.59–2.84)***

2.50 (2.38–2.63)***

Use of drugs associated with sex and parties in past 4 weeks

3.26 (3.04–3.50)***

2.30 (2.14–2.47)***

Erectile dysfunction drugs in past 4 weeks

3.36 (3.16–3.57)***

2.77 (2.60–2.96)***