Table 2 Multivariate logistic regression: factors associated with serosorting
aOR | 95% CI | P-value | |
|---|---|---|---|
Survey year | |||
2007 | 1 | 0.982 | |
2009 | 1.00 | 0.69–1.46 | |
Survey mode | |||
Paper | 1 | ||
Internet | 0.83 | 0.55–1.25 | 0.367 |
Age | |||
< 25 yr. | 0.83 | 0.50–1.36 | 0.457 |
25–49 yr. | 1 | ||
≥ 50 yr. | 0.72 | 0.40–1.30 | 0.275 |
University degree | |||
Yes | 0.90 | 0.61–1.32 | 0.579 |
No | 1 | ||
Nationality | |||
Non-Swiss national | 0.98 | 0.62–1.55 | 0.943 |
Swiss national | 1 | ||
Residence area > 100,000 inhabitants | |||
Yes | 1.22 | 0.84–1.77 | 0.306 |
No | 1 | ||
Gay organization | |||
Yes | 1.67 | 1.02–2.73 | 0.043 |
No | 1 | ||
Steady partner a | |||
Yes | 0.75 | 0.52–1.08 | 0.119 |
No | 1 | ||
Number of sexual partners with AI a | |||
1–5 partners | 1 | ||
≥ 6 partners | 1.32 | 0.88–1.99 | 0.181 |
Regularly frequenting sex-on-premises venues a | |||
Yes | 0.42 | 0.26–0.708 | 0.001 |
No | 1 | ||
Frequent use of the internet for sexual encounters a | |||
Yes | 1.71 | 1.16–2.50 | 0.006 |
No | 1 | ||
Sexually transmitted infections a | |||
Yes | 1.70 | 1.07–2.69 | 0.024 |
No | 1 | ||
UAI with partners of different or unknown HIV status a | |||
Yes | 0.22 | 0.14–0.32 | 0.000 |
No | 1 | ||
HIV test a | |||
Yes | 1.47 | 0.98–2.19 | 0.063 |
No | 1 | ||
HIV status declared | |||
Unknown | 0.74 | 0.44–1.24 | 0.256 |
HIV negative | 1 | ||
HIV positive/Aids | 0.52 | 0.31–0.87 | 0.013 |
Frequent substance use while having sex a | |||
Yes | 1.01 | 0.67–1.52 | 0.958 |
No | 1 | ||